AMD Unofficial Overclocking Guide 754/939/AM2

Before trying this be Aware THAT IT IS POSSIBLE TO DAMAGE YOUR PC and it is your responsibility if anything goes wrong.

with that out of the way onto the good stuff


1. Go into your PC's bios. This is accomplished by restarting your computer and when prompted to enter setup hitting either F1/F2 or DEL. It varies on your computer as to which key to hit.

2. Enter Advanced Chipset features, it's on the BIOS menu. (Note, some bioses require you to press crtl F1 to display the advanced features)

3. Find HTT Speed and lower it to either 4x or 800MHZ for 939/AM2 and Socket 754 users need to lower it to 600MHZ. Stock with be 1000MHZ for 939/AM2 and 800MHZ for 754. Make sure you keep it under 1000mhz, for 939/am2 and under 1600mhz for 754.

4. Lower the RAM speed to 166MHZ for DDR 400, or 133MHZ for DDR 333. Stock will be 200MHZ for DDR 400 and 166MHZ for DDR 333. For DDR2, lower it to 667 for DDR 800, or 533 for 667 (Depending on your RAM and how far you want to OC, you might be able to leave this alone. More explantion below)

5. Increase your CPU FSB slowly, 5MHZ at a time, until it either A, it won't boot, or B you are happy. If you're happy, skip to step 7. If you crash continue to step 6.

6. Increase CPU voltage by one notch and try again. Never go over 1.55V with stock cooling. For X2 users, never go over 1.45V

7. Always keep your temperatures below 50*C at FULL load. For X2 users never go over 45*C at full load.

8. Stress test with prime 95 and memtest to ensure stability. (Torture test with small FFT's is best,any errors at all means its not 100% stable,either lower your OC by a few MHZ or increase voltage a step)


NEVER PANIC if something goes wrong. If it refuses to post and you get nothing but a black screen, reset the Cmos. You can do this by removing the Cmos battery, or by using the clear CMOS jumper. Always have the computer OFF when removing the CMOS battery or jumper.Some newer boards simply have a nice reset cmos switch externally which makes things easier.

RAM explained. You can probably leave your RAM at 200MHZ so long as you drop the command rate to 2T and you only OC the CPU FSB by 10-20MHZ. If you go higher than that, you need to lower it to 166MHZ.

You can find Prime 95 here:
http://www.majorgeeks.com/Prime95_d4363.html
And Memtest here:
http://hcidesign.com/memtest/download.html



When using the Stock Heatsink and fan that came with your CPU or PC ,dont expect to get huge overclocks,to get a reasonable or good clock you will most likely require 3rd party cooling EG:Artic Cooling Freezer 64 or better.


This is just a basic AMD overclocking guide to get you started ,there are much more advanced guides out there but if your new to OC you probably want something a bit easier to understand,hopefully this guide does that enough to get you on your way.

This post has been edited by xu: May 23 2008, 12:54 PM

Cheers XU, If i can grow a bigger pair of balls i might try this as I want a faster running PC - even if it is just a bit.