Q6600 (G0 Stepping) Overclock Guide

December 12, 2007

DISCLAIMER: Game and Tech Reviews is not responsible for any damage you do to your CPU or other components.

In this tutorial, I will walk you through the over clocking process on a Asus P5K-E motherboard. First, you are going to need several programs to record temperatures, monitor your processes, and stress test. You are going to need coretemp to monitor your….well… core temperatures. A download can be found here: http://www.alcpu.com/CoreTemp/ . You are also going to need CPU-Z to list all the different settings found on your processor and RAM. Download link: http://www.cpuid.com/cpuz.php . Finally, to test system stability you will need Prime95 v25: http://www.majorgeeks.com/Prime95_d4363.html .

A very important note: Make sure you have proper cooling. Stock cooling will probably not cut it. The T-Junction on the Q6600 (G0) is 100C. The T-junction is the maximum temperature at the junction between the processor die and the PCB it sits on. I recommend you don’t press past 75C. It will shut down to avoid damage, but it is best not to push it. I have a Thermalright 120 Extreme. That is one of the best heat sinks available right now. You will need proper cooling to over clock your CPU. Over clocking is a trial and error process. You will probably crash a couple of times. After a crash your computer might not restart right away. THIS IS NORMAL. Turn off your PSU, wait about 15-30 seconds and try again. Different CPU’s over clock differently. If you haven’t already done so make sure your chip is a G0 revision by looking at CPU-Z. This revision runs cooler and over clocks better. Your results will probably differ from mine. This is a very basic tutorial, and is written for those with very limited computer knowledge, so, vcore, North Bridge, and RAM voltages will not be altered. They will all remain on auto. This reduces the chances of damaging your precious new system.

Let’s start with a run down of all the terms you are going to need to know. Here is a very simple diagram of how the computer works: http://upload.wikimedia.org/wikipedia/en/9/98/Motherboard_diagram.png It is very important to understand how the computer works before you begin to tamper with it.

BIOS – Basic Input Output System- This preps all of your system components and runs tests to make sure everything is functioning properly.

CPU (Central Processing Unit) – If you don’t know what this is you probably shouldn’t be over clocking in the first place. But, if you want to continue, the CPU handles all the data. Literally every shred of information is passed through this chip. Basically it just does a whole bunch of math.

FSB (Front Side Bus) – This relays information from the CPU and the north bridge.

Clock Multiplier– Basically this allows the CPU to run at a higher speed/frequency than the North Bridge and FSB. The CPU speed is found my multiplying the FSB with the clock multiplier. For example: 9 x 333= 299.7

Let’s Go!

Restart your computer and hit delete during the first few seconds. This will bring you to the BIOS.

Use your keyboard to select the “Advanced” tab on the top. You will see a whole bunch of different settings; and, this is intimidating at first.

Switch the Ai Overclocking to manual. This begins the trail and error. The higher the FSB the higher the performance. So, drop your Ratio CMOS Setting (multiplier) to 7; and, try 475 for your FSB frequency. If, it doesn’t boot or it’s not stable in a stress test lower it by increments of 5. I found mine was stable at 7 x 470 which gives me 3.29. Not bad for no voltage increases. It runs at about 57C under load and 30C idle. Remember, idle temperature mean next to nothing. Load temperature is what matters. Your results WILL vary. You may find that your FSB is stable at 480. That’s great. Just always remember TEST STABILITY. Run small FFT’s and then Large FFT’s. I recommend doing stress tests of 5 hrs minimum. Prime95 is your stress test application, and you should see 4 instances of it running: 1 for each core. Remember to watch your temperatures during testing. They should not exceed 70C.

(For those of you wondering why your CPU-Z reads a low clock speed. It’s because your CPU isn’t under stress, and you have C1E enabled on the CPU Configuration menu. This drops down you multiplier to x6 to save power during times of low CPU usage.)



46 Responses to “Q6600 (G0 Stepping) Overclock Guide”

  1. Mister said

    Where are all the screens, statistics, overclock numbers,…

    And why is it so difficult to find a guide for overclocking a Q6600 :\

  2. gameandtechreviews said

    I walked you through the overclocking procedure and provided you with tips and insights. The pictures in this guide, however, are specefic to the Asus BIOS. I used that because I prefer Asus for overclocking. Overclocking is a trial and error thing. You are going to have to try and fail multiple times before you understand just how overclocking works. It is incredibly hard not to write a generalized guide for overclocking because it not only varies from processor to processor, but it also depends on your RAM, cooling, motherboard, etc. I did provide screen shots.

  3. Charta said

    This guide is perfect! Straight and to the point, just what I needed. Only thing is I have two questions before I start to overclock.

    1. I see some guides suggest turning your RAM to a 1:1 ratio with your FSB. A little bit confused on that but is it necessary?
    2. Why bring the multiplier from 9 to 7? Just a bit of curiosity.

    Sorry if these questions seem unintelligent, my knowledge on overclocking is pretty low 😛

  4. gameandtechreviews said

    1. I wouldn’t worry too much about the ratio. It only makes a slight difference. And when I say slight, I mean that it would probably not even show in benchmarks.

    2. The faster you can get the FSB the better. Higher FSB=Better Performance. If you lower the multiplier, you can raise the FSB and keep a lower clock speed. I hope I explained that well.

    No, no. Thanks for the comment and thanks for viewing my blog.

  5. Tom Richards said

    Hi, and thanks for the OC info. But I have a question. I have the exact CPU/mobo set up as you, running exactly as your info and screens are, and got the same results as you. I started at 480, got an error in testing with the software you suggested. Dropped to 475, got an error, ended up at 470 which ran on the torture test for 21 hours with no problems. But my FSB speed shown in the bios is 1888MHz? And your screen shot shows yours at 106MHz?? This is on the Configure advanced CPU settings page of the bios. Plus I was unable to get my memory to be correctly identified by CPU-Z, it lists it as Kingston PC-6400, when it is actually Kingston DDR-2 2GB PC-8500 1066. I have it set to 5-5-5-12 at 2.2v as per Kingston’s specs. I bought the 2gig RAM listed in the P5K-E owner manual, which said it was 100% compatable. Should I go in and change the 1888MHz? dropping it down to 1092MHz, 1066 is not even listed. Any help would be appreciated. Am I hurting anything as it is? CPU temps never got over 63 with a Thermal Lake t1 CPU cooler, and mainly ran in the 55 – 57 degree area during the torture tests. Thanks, Tom

  6. Tom Richards said

    typo; And your screen shot shows yours at 106MHz?? should say 1066MHz. Sorry, T

  7. gameandtechreviews said

    Tom, you aren’t hurting anything with those temperatures as long as that is a load temp. No, don’t lower your RAM speed. Get that as high as it can go just don’t go over 2.2v. That’s some high quality RAM. For this guide, I used some cheap Crucial Ballistix 6400 at 4-4-4-12. A long time ago the RAM and the CPU had to be synchronized, but newer advances in motherboards allow them to run asynchronous.

  8. vee said

    Good guide!
    I wonder if I missed something though. I have the exact same motherboard, but I have an Arctic Cooling Freezer 7 Pro. At 2.4 it idles at 34*. I tried overclocking with a Multiplier of 7 and a FSB of 435 just to test it out. When I run coretemp after the changes are applied it says core temp around 37 but CoreTemp and My Computer details both show that my Frequency was 7 x 560 or something and that it was at 3900 MHz. I panicked and switched it back to Auto. What could be the problem ?

  9. gameandtechreviews said

    I have found Core Temp can’t correctly read the FSB, and it ends up reading something outrageous like 5.7GHz. Use CPU-Z and make sure you stress test and look at the load temperatures.

  10. XTPilot said

    I am using P5K-E WiFi Edition(with Dec-2007 BIOS 0901) and Q6600 G0. Cooling is Thermaltake Typhoon VX, and 2 120mm intake and outtake fans in Antec Sonata II with Antec Smart 450W. Video Card is Nvidia 8600GT-512MB (no need for 8800GTX as Flight Simulator X can only gain may be another 2-4 FPS, the game is extremely CPU intensive).

    At stock speed – CoreTemp 0.96 reports 27-32C idle and 43-47C stressed with Prime95 (Core 0/1 is higher than Core 2/3).


    (A) Isn’t getting a higher FSB with lower multiplier will (1) Increase your vCore requirement, and (2) Increase CPU temperature?

    (B) Can you tell me if there will be any effect on the memory or the PCI-E video card if vCore is increased?

    (C) When would you need to increase the North Bridge Voltage?

    (D) When you increase the North Bridge Voltage, vCore – what do you need to be careful on your PCI-E FSB (effects on Graphics card)?

    (E) Since you are pretty technical, I’m sure you have tried other settings on your BIOS and get more juice out of the Q6600 G0 (e.g. adjust vCore, Multiplier, FSB, Memory Voltage, Timing, DRAM Command Rate, etc) – would you mind to post all those “advanced” settings where you get a stable system? As we have the same board and G0 Q6600 – just want to know how to play around with the other “advanced” settings to get the most out of it … my goal is to get to 3.4GHz to 3.6GHz but I am not too familiar with all the BIOS advanced settings in my ASUS P5K-E WiFi … just want to copy some success from you. Hope you don’t mind.

  11. gameandtechreviews said

    1. The higher the FSB, the better the performance. It comes down to the choice between higher clock speed and higher FSB. Usually a higher clock speed will win. But, two separate, identical processors running at the same speed, the one with the higher FSB will preform better.
    2. In order to achieve higher FSB speeds you will need increase voltages. Higher voltages=more heat.

    (B) No, not directly. If your ambient temperatures are too high, you could damage other components, but that is extremely unlikely. Don’t raise the voltages to the PCI slots. You may have to increase the voltages to the RAM if you push the RAM to higher clock speeds. Don’t push it past 2.2v. They won’t last long without additional cooling 😉

    (C) Only if your oc is unstable; and it absolutely needs to be turned up, usually at higher FSB speeds.

    (D) Hmm, as far as I know that shouldn’t have any effect (heat wise) on your GPU. Maybe with ambient temperatures. And, I doubt you are pushing 60C+ in your case.

    (E) Sure, I’ll take some pics of my current settings. Just know that your results might vary from mine. Each CPU overclocks differently.

  12. XTPilot said

    Wow … that was quick, thanks for the quick response. Look forward to your P5K-E BIOS settings with the Q6600 G0, I’m assuming BIOS version 0901 should same – I’ll use your as a reference before I OC mine may be this weekend.

    BTW – I found this link also useful for Q6600 OC – very detail writeup: http://forums.anandtech.com/messageview.aspx?FTVAR_FORUMVIEWTMP=Threaded&catid=28&threadid=2057083

  13. Sam Stapley said

    I have an Arctic Cooling freezer 7 Pro…..

    do you think this will provide me with sufficient cooling?


  14. gameandtechreviews said

    Sam, yeah that should sufficient for a 3.0-3.4 GHz overclock.

  15. Sam Stapley said

    Cheers mate..will follw this to the letter tonight 😀

  16. Pmaer said

    Can you explain why your FSB Speed is only 1066Mhz when your FSB Frequency is set at 470. Correct me if iam wrong, FSB Speed = FSB Frequency x 4. Based on this i think your FSB Speed should be like 1880Mhz.

  17. Kevin said

    Hi, I was wondering if there is any point in changing the CPU Voltage? I see most people turn up their Vcore, and is wondering if they turn up the CPU VTT as well.

  18. Johnny B said

    Hey thanks for the info. I have a problem. FYI my motherboard is a MSI P6N sli (650i). I overclocked my Q6600 to 3.0 ghz (FSB 1333), but everytime I do the temperatures are normal, but my video card reports an error that it couldn’t load some driver. When I restore the FSB to 1066 I have no problems. Could power be an issue whereas I have a 550W PSU. I am sorry to be a bother, but I am new at this.

  19. Sam said

    Hi there,

    I’m about to buy a new computer, these are my specs:
    CPU: Intel Q6600
    Memory: 2X Kingmax 2GB single.
    Motherboard: GA-X38-DS4
    Hard Drive:Western Digital 320GB SATAII 16MB
    VGA card: Asus 512Mb 8800GTS
    Case: Antec Nine Hundred with extra 120mm side mounted fan and extra 120mm internal CPU cooling fan.
    PSU:Antec true power quattro 850W

    I’ve got a couple of questions I’m completely new to overclocking.
    first will the extra internal fan (antec tricool 120mm) be enough to cool the cpu or will i need an additional cpu.
    also could you give me a rough estimate of how much i could overclock with this setup?

    Thanks heaps. You;ve been a real help.

  20. Ed said

    Thanks for the clear guide. I updated my BIOS to 904 on my P5K-E with a Intel Q6600 but I’m unable to change the CPU Ratio Control to Manual. Stays on Auto. Same thing under CPU Control. I cannot change the CPU Ratio Control to Manual. Any suggestions?

  21. Haz said

    I found a massive spike in voltage. I have pretty much the same set up as you, and I pushed my clock to 7×460. Voltage went from 1.17v to 1.32v. Is this safe?

  22. minh said

    Hi i about to build a new com witch these spec.

    CPU: Q6600 (go)
    Mobo: P5K-E/WIFI
    RAM: kingston 1066 (2Gb)
    HS: Tuniq tower 120
    monitor: 22″ ASUS VW222U 2ms
    VGA card: 1GB 8600GT Generic
    PSU+case: 600W (standard)
    Hard drive: seagate 320GB

    Win vista 32 or 64 i dont know yet. Properly 32.
    Seen 64bit have to much unsupported software.

    Do you think i can OC to 3.4Ghz witch that spec?
    But fully LOAD under 60c? 24/7. Sometime my com on for weeks without shutdown.
    And more think do change timing of RAM make a lot of deferent ? eg.DDR2-1066 is to

    waiting for your answer. Thank you in advance.

  23. gameandtechreviews said

    Ok lots of answers in this one. I apologize for being this late on answering:

    Kevin: Only up voltages when the system is unstable. And there is no point in uping the CPU VTT.

    Johnny: It would be extremely helpful to post a description of every part of your system and your operating system. Screen shots of temperatures would help too. The most I can do right now is guess at what the problem is. Sorry man.

    Sam: Do NOT attempt to overclock with the stock HSF. Buy yourself a quality cooler. Each chip over clocks differently. For example, mine hits the wall at about 3.59GHz. Yours might hit the wall at 3.7GHz. It’s just a craps shoot. I can tell you that you will need a good HSF to reach speeds over 2.8GHz or so.

    Ed: Hmm… That’s a tricky one. I would suggest trying to flash the BIOS once more or calling Asus with the problem. Make sure you are saving the settings before you exit.

    Haz: As long as your temperatures are below ~70C you should be fine! 🙂

    minh: You can most likely reach 3.4GHz. RAM timings don’t really make that much difference except in benchmarks. Load at 60C is fine. I don’t think your computer will be at load all the time anyway. But even if it is, you will still be fine.

  24. minh said

    Thank you very much for quick your reply.
    Now i can feel save when buying those parts.

  25. BizSAR said

    Ed: You have to type the number you want when ‘Auto’ is highlighted. Pressing has no effect. I ran into the same thing, lol.

    BUT, I’m having a different issue:
    I’m using the same mobo and CPU, but BIOS rev. 1006 (latest beta). The ratio control is x.x instead of the bios shown. I set the ratio to 7.0 and the FSB freq. to 470, 465, & 460. Each time I save & restart, I hear the fans come up, the CPU fan (Zalman CNPS9700NT) kicks into a higher speed, and…nothing, zip, nada (waited for 3-4 minutes)- no POST/monitor image. I have to shut everything down, wait a few seconds, and bring everything back up. When I do that, the POST states the CPU is at 1.87GHz and I get the “overclocking failed” message. Resetting to defaults sets everything back to normal (bleh, 2.4). Any ideas? I see C1E support turned off in your screen shot. Should I do the same, or is it something else?
    Thank you!

  26. Neil said


    It’s very nice of you to offer your knowledge and help others. If you have a moment, I would love to know if my rig is running at it’s optimum. It’s only purpose is for video editing and I’m not necessarily looking to overclock anything, but achieving the fastest way of slinging video around through the board is what I’m after.

    Here is my read from cpuid …

    Number of processors 1
    Number of cores 4 per processor
    Number of threads 4 per processor
    Name Intel Core 2 Quad Q6600
    Code Name Kentsfield
    Specification Intel(R) Core(TM)2 Quad CPU Q6600 @ 2.40GHz
    Package Socket 775 LGA
    Family/Model/Stepping 6.F.B
    Extended Family/Model 6.F
    Core Stepping G0
    Technology 65 nm
    Core Speed 1603.7 MHz
    Multiplier x Bus speed 6.0 x 267.3 MHz
    Rated Bus speed 1069.2 MHz
    Stock frequency 2400 MHz
    Instruction sets MMX, SSE, SSE2, SSE3, SSSE3, EM64T
    L1 Data cache (per processor) 4 x 32 KBytes, 8-way set associative, 64-byte line size
    L1 Instruction cache (per processor) 4 x 32 KBytes, 8-way set associative, 64-byte line size
    L2 cache (per processor) 2 x 4096 KBytes, 16-way set associative, 64-byte line size
    Chipset & Memory
    Northbridge Intel P35/G33/G31 rev. A2
    Southbridge Intel 82801IR (ICH9R) rev. 02
    Graphic Interface PCI-Express
    PCI-E Link Width x16
    PCI-E Max Link Width x16
    Memory Type DDR2
    Memory Size 2048 MBytes
    Memory Frequency 534.6 MHz (1:2)
    CAS# Latency (tCL) 5.0 clocks
    RAS# to CAS# (tRCD) 7 clocks
    RAS# Precharge (tRP) 7 clocks
    Cycle Time (tRAS) 24 clocks
    Command Rate (CR) 2T
    System Manufacturer System manufacturer
    System Name P5K-E
    System S/N System Serial Number
    Mainboard Vendor ASUSTeK Computer INC.
    Mainboard Model P5K-E
    BIOS Vendor American Megatrends Inc.
    BIOS Version 0806
    BIOS Date 10/31/2007
    Memory SPD
    Module 1 DDR2, PC2-5300 (333 MHz), 1024 MBytes, OCZ
    Module 2 DDR2, PC2-5300 (333 MHz), 1024 MBytes, OCZ

    the rest of the rig consists of 4 x 250g drives on raid 10, a raptor for windows, 8500GT display, decklink HD Extreme I/O vid card and a huge cooler master case full of fans.

    am I optimum? 🙂

    thanks in advance

  27. gameandtechreviews said

    BisZar: That’s right. Your overclocking has failed and you probably need to increase voltages. It is a built in feature to prevent damage to your system. Increase voltages by the lowest number you can.

    Neil: No problem man. Just trying to help people who started out like I did. You could increase productivity by increasing your amount of RAM and possibly upgrading a 64bit operating system. The added RAM will help with the incredible amount of system resources video editing programs take up. Raid 10 is a great idea and so is the Raptor. You could increase speed by getting another Raptor in RAID 0. But I only recommend that if you have 150 bucks lying around and don’t know what to do with it. I would HIGHLY recommend you upgrade your graphics card. I’m not entirely sure just how intense your editing projects are. But, I think a 9600GT is worth looking into: http://www.nvidia.com/object/io_1203588081917.html

  28. Neil said

    wow…with faster help service than these manufacturers, you need a paypal tip jar! 🙂

    ram: I noticed the cpuid read my ram as pc25300 and the store says it’s pc28500… anything up with that? I would like to max the ram to the 3g limit, but I can’t find 2-512 sticks locally.

    The 64bit os can’t be done yet because of broadcast production software limitations (still all in 32bit…apparently they don’t need the 64bit and just require insanely fast read and write drive speeds) thus my quest for the best fsb set-up I can get….

    The 8500gt is just for dual display of low res video within the editing app….. the Decklink HD card is the main meat and potatoes and spits out the 3rd display to the plasma in full 1080p and to the broadcast beta decks.

    A second raptor for the os might be an idea….the apps are pretty cpu intensive, do you think they would run that much faster? I’ll need a sata control card #$%^$#@&@$%!!!

    how about this 1:2 fsb/ram ratio I have going on? is this thing running optimum? can I get my video from the video to the striped drives any faster with what I have?

    thanks man 🙂

  29. BizSAR said

    Thanks, but how did you get the results you did without increasing voltages? I have the same mobo and cpu as you. Is it a PSU issue? I’m running the Antec Earthwatts PSU (500 or 550 watts).
    You rock man! I’m subscribing.

  30. gameandtechreviews said

    I left it on auto for this *basic* guide. There is a point at which the motherboard will decide that that’s too much voltage for it to give on its own. I’m fairly certain it’s different for every motherboard/configuration. My first suggestions is to increase your north bridge voltage by one increment and leave it on auto. If it doesn’t boot, return it to the lowest stable clock speed, and check CPU-Z to see how much the vCore is. Enter roughly that number (if it isn’t exactly an option just round up) in the vCore and then slowly increase the FSB and voltages until you get the desired speed.

    Mine right now is: 3.56GHz (8×445) and my vCore is 1.360 V.

  31. gameandtechreviews said

    Thanks for your responses guys!

    DDR- Double Data Rate
    1:1 would be 1066 but since yours is a lil off…the RAM is running faster than normal 🙂
    You can still put in 4GB but about 1GB just won’t be recognized.

    I envy your set up! Sounds pretty incredible.

    The whole idea of a Raptor is the low random access times. It would make your programs load even faster if you added a second one in RAID 0. The only draw back is that if one fails you loose the whole array. So, you’d need to make regular back ups. It would have no affect on rendering times but it would decrease the time you spent waiting on files to load or programs to open. It would just make your zippy computer even zippier.
    I didn’t know you’d need to pick up a controller card. They are pretty cheap, but now I’m rethinking whether or not a second Raptor would really do any good. It would increase heat in the case which may be a problem.

    The ratio is just like any other ratio. In 1:1 the Bus Speed should be the same as the frequency of the RAM. For example mine is 445MHz:445MHz.
    It’s not a huge deal if your ratio is off a tad. It’ll only show up in benchmarks. And even then its only a few points here or there.

  32. Niels said


    I also have the Q6600 quad, with an Asus P5E motherboard. I have a few questions about this overclocking.

    1) When I overclock with 9×355 = 3200 Mhz, my CPU doesn’t get’s over 52 degrees Celcius (load). But performance is (much) better when I use 7×457, which is also 3200 Mhz. But temperature reaches up to maybe 60 degrees (load). Is this to hot? I’m just using the cooler that came with the processor. Also, the motherboard specs say it can handle a certain FSB (highest 1600mhz). But when I overclock to 7×457 is has a FSB of +/- 1880Mhz, is this bad?

    Kind regards,


  33. Mal said

    I’m about to upgrade. I’ve bought a Q6600 (SLACR), though I haven’t decided on a mobo yet .. any current recommendations btw? or ones to avoid? – I’m going with DDR2 and I *might* want to go with two nVidia cards, eventually.

    Anyway, back to my question here: you say, “I can tell you that you will need a good HSF to reach speeds over 2.8GHz or so.” I’m wondering if there’s anything necessarily wrong with keeping the core speed (multiplier) the same and overclocking the FSB to 333 with the stock cooler/heatsink. Or perhaps limiting it to about 310MHz, giving a speeds of 3GHz or 2.8 GHz respectively.

    What kinds of temperatures are those likely to produce?

    Finally, I have 2 x 1GB sticks of Crucial Ballistic 8500 (BL12864AA1065) DDR2 and I was wondering if I could run this at a 4 CAS. I think it’s rated at CAS 5… 5-5-5-15. Is there much advantage to setting this to 4-4-4-12, or is it even possible/stable?

    Thanks in advance.

  34. Mr serene said

    OK…I have exact same mobo..Kingston ram ,Q6600..8800gt ect…was doing the 333 X 9 thing without much joy!
    The weakest link is always the problem…Sooo I updated my psu to 850watt and viola!
    Oclock to 3Ghz easy!…temps 48 to 50 overload for hours on stock air!…I have a Tuniq tower in my cupboard but it is so big!…Great cooler but not necasarry!…fsb = 333X4 = 1333….ram X 1.5 = 333+333=666 X 1.5 = 999 mhz but bios shows 1095?…cool! I could set to 1:1 showing 1333 ram speed but…It is stable as is and thats is good enough!

    Next time will get mobo and ddr3 that does fsb 1600 and see what happens until then hooray!

  35. Rory said

    Hi, i need help with overclocking my q6600 g0.
    This guide is perfect for my needs, my target for overclocking was 3ghz. however, unlike you i have the asus 680i sli chipset, which asks me not to put in a three digit fsb like you (eg 475) but asks for a four digit sort of one (eg 1066). i came close to killing my computer typing in numbers into the fsb thing, having lowered the multiplier to 7.btw my memory isnt crucial, its corsair xms6400.what number should i type into the fsb thing+ does it matter about the memory ratio. my memory ratio auto is 2:3.

  36. Mr Serene said

    In response to Rory questions…the front side bus is 4 times the cpu frequency…so to answer your question if you multyplier is set to 7 and you want 3ghz cpu speed…then set your cpu frequency to 428 ….and your fsb will be 1714mhz wich is way high!…(It might work…for a while)
    I would suggest lowering your cpu frequency to 333 and up the multiplier to 9…then your fsb figure would be 1333mhz and ram multiplier set to auto should be 1.5…remember that ddr2 means that whatever the clock speed is on your ram half it that gives you the frequency…eg 1066 equals 533….sooooo if cpu frequency is 333 divide 533 by 333 and there is your cpu to ram ratio…good luck Rory!…I hope that this helps!

  37. tim h said

    awesome guide, taught me to set my voltages manually though… auto setting on p5k pro ended up at 1.424 vcore which scared me.

    right now im running at stock voltage 1.28123vcore, fsb of 424 and a multiplier of 7. but this sends my 800mhz rated memory to 849mhz.. i set the dram voltage to 1.9 like the corsair website rated it at, pc runs perfectly stable according to torture test..

    just wondering if overclocking the ram like so could cause damage?
    iv retired my current o/c and returned to default until i can work this out.

    thanks once again!

  38. Bootney said

    I too have the Asus P5K Premium and would like to overclock it to a round 3Ghz
    What your best settings?
    Mean specs are: Asus P5K Premium, Quad Q6600, Crucial Ballistix 2GB 8500C5, Arctic Cooling Freezer 7 Pro.

  39. Mr Serene said

    Overclocking RAM is pretty safe at around %10 eg…800mhz to 880mhz is fine….and pretty safe!
    Heat is the main concern here…at speeds above %10 I would install ram cooling.
    Try not to go over a %20 oclock with ram as you will crash and burn!

  40. Lucas said

    Hi there. Thanks for this guide, but I have a question. I also have an ASUS P5K-E motherboard, and a Q6600 intel processor.

    As for video card, I have a Sapphire Radeon HD3870x2, and 4gb of RAM (Corsair 2x2gb).

    For the cooler, I got a Thermaltake Big Typhoon VX.

    I loaded your settings at the BIOS, and got OC @ 3.3GHz, but I’ld like to know what are the settings to obtain a 3.6GHz OC.

    Also, do you think that my computer could handle that OC?

    One last thing. With your settings loaded and the processor running @ 3.3GHz, for some reason, in My PC properties, it says that it’s running at 4.3GHz. (I’m using Windows XP SP3).

    Thanks alot!

  41. gameandtechreviews said

    Remember guys, heat is the enemy here! Keeping your components cool is the biggest concern here. For the Q6600(G0), the safe range is <70C

    RAM is a lot trickier with overclocking. There are many factors other than just voltage and clock speed. You have CAS timings, ratios, etc. RAM is also one of the toughest to keep cool. Most RAM does not come with active cooling. Which means it is up to the consumer to seek aftermarket cooling solutions. But, aslong as you keep your overclock reasonable there shouldn’t really be a need for active cooling if you have heatsinks on your RAM. If you don’t…DON’T OVERCLOCK!!! I have my RAM set to 2.2v 4-4-4-12 and stock clock speeds. I won’t push the voltage any higher. And I don’t recommend you do either 😉

    Lucas: Your OS is not able to read the settings from your BIOS. That’s normal. Get CPU-Z and rely on it for the clock speed. And make sure to use CoreTemp for watching the temperatures. To get the 3.6GHz OC you are going to need to set the voltages manually. Which is trial and error based on the motherboard (each one is unique 😉 ). So, load your current overclock and set it on load. Look at the vCore in CPU-Z and then go into the BIOS and set that as your voltage. Then it becomes a trial and error process to get the overclock stable. Gradually increase the clock speed and voltages and make sure to stress test paying special attention to temperatures. Because each CPU and MOBO are unique, your results WILL be different than mine. That’s just how this addicting game works 😀 Crucial note: relax your memory timings and other overclocks to make sure the CPU is the only cause of failures.

    Good luck to everyone and thanks for reading!

  42. Lucas said

    Hey there again. I’ve started to have problems lately with the config. you suggested. Nothing wrong with the CPU or the motherboard (I think).

    For some reason, the RAMs have been having problems lately. When I play high-end games, like World In Conflict, the computer reboots (not shutting down) and starts over. When I get to windows, the error message says the system just recovered from a serious problem.

    Now, until yesterday, it gave me a link in wich windows support told me they couldn’t assist me as they didn’t know the problem completly.

    But yesterday, it gave me a link of microsoft support in wich they told me that “an error ocurred due to an error of the random access memory (RAM) of this computer”. Told me to download the Windows Memory Diagnostic tool, and I did.

    When I ran that program, it encountered many mistakes. Actually, it couldn’t ran for long, as it froze after some time. Went back to the normal BIOS settings, ran the program again, and no errors were found. I used the default config for a few days, and went back to the 3.3Ghz. Ran the test, and found no problems. I’m kinda confused on what exactly may cause the problem. So, if it isn’t much to ask, I’ld like for you to see what could be done to fix this up.

    Sorry for the long text.

    Thanks in advance.

  43. Lucas said

    Forgot to add. When I play those high-end games, I get to play them for a while, and then the system reboots.

  44. Drago87 said

    If core temp seys the temp are at 69*C after 1 min is it safe to keep running prime95? (get the same result 7*440-7*475 FSB and alvays shut down prime95 manualy when it hits 69*C)Or should i keep lovering the FSB?

  45. gameandtechreviews said

    Lucas: Initially I thought Windows (XP SP 2 I assume) had started to “rot.” Windows XP begins to degrade over time, and the process is sped up dramatically when you overclock. When you overclock the RAM, make sure to run MemTest. Did you have any RAM overclocking before you reset your BIOS? If so, that was likely the problem. As far as rebooting when you play games, an overclocked computer usually only restarts when the temperatures get too high or there is not enough voltage to a component. Be sure to stress test your overclock before playing games. However, I don’t know if you overclocked your GPU as well. Make sure to monitor GPU and ambient temperatures as well. Graphics cards are notorious for running hot and a high ambient temperature can cause some problems for everything in your case. Proper airflow is VERY important!

    Drago87: What are all your specs, settings, and temperatures? 69C is a little high for my taste especially after one minute. I would let it run for an hour or so and if it ever gets over 75 shut it down. In my opinion, high 60s to low 70s are acceptable only for benchmarking. I would never have that as a 24/7 overclock.

    I apologize for not checking my blog more often. Things have certainly changed in my life, and I don’t think I will make anymore reviews. Perhaps a few tutorials here and there.

  46. Drago87 said

    Havent canged any settings other then multiplier and FSB and my idle temp is betvene 30-40*C

    This is my specs

    Corsair TW3X4G1333C9DHX 2x2048MB (tot. 4096MB) DDR3 1333MHz

    Arctic Cooling MX-2 Thermal Compound 4gr

    Asus P5K64 WS iP35 4DDR3-DIMM 2PCI 4PCIe SATA Raid Audio DUAL GB-LAN Socket775 ATX

    Intel Core 2 QUAD Q6600 2.4GHz 8MB FSB1066 Boxed (with cpu-cooler!) Socket 775 (G0)

    Windows Vista Home Premium 64-bit DVD SWE OEM

    ZEROtherm Nirvana NV120 CPU Cooler -775/AM2

    A Sapphire Radeon HD 3870

    A sidemounted fan that sucks air

    And a 750W powersuply

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