Follow up to my unofficial guide to overclocking the AMD 64 line, I bring you the C2D guide for simple overclocking. This is a very simple guide meant to ease the beginner into overclocking their Core 2 Duo. Let me also forewarn you that overclocking can be dangerous if done improperly and I am in NO WAY responsible if you damage your computer. 1. Go into your PC's BIOS. This is accomplished by restarting your computer and when prompted to enter setup hitting either F1 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). This could also be called "Motherboard Tweaker", or Overclocking. On Asus motherboards, it's called Advanced AI. 3. Change the Ram divider to 2.0 to start with, that will give a 1:1 Ratio. Since it's Double Data Rate it will go up 2MHZ for every 1MHZ CPU Frequency. Depending on your RAM and CPU overclock, you may be able to take this to a higher ratio. If you are using a motherboard that shows the ram speeds, then lower it to the lowest speed. You can up this later to your stock frequency, or higher, but right now, we want to make sure that the CPU overclock is stable. 4. Set your PCI-E Frequency to 100MHZ, DO NOT leave at auto. 5. Increase your CPU Frequency slowly, 10 to 20MHZ 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 1.4V with stock cooling. On a 45nm Wolfdale chip, never go over 1.325V with stock cooling as these chips heat up much quicker and at less voltage than the 65nm chips. 45nm chips are: E5200, E7200, E7300, E8200, E8400, E8500, E8600. E5200 Revision* I can say that with stock cooling on an E5200, you should not go over 1.4V. With good air cooling 1.5V should be fine. 7. Always keep your temperatures below 60*C at FULL load using Realtemp. 8. Stress test with prime 95 and memtest to ensure stability. Use Realtemp for 45nm chips or CPUID's HWmonitor for 65nm chips to monitor temperatures. 9. If you are unstable, you have 2 options. Downclock your CPU Frequency by 15MHZ, or up the CPU Voltage by one notch at a time until it's stable. Here are some pictures of the bios settings. http://i108.photobucket.com/albums/n10/JC316_2006/100_8305.jpg http://i108.photobucket.com/albums/n10/JC316_2006/100_8306.jpg http://i108.photobucket.com/albums/n10/JC316_2006/100_8307.jpg http://i108.photobucket.com/albums/n10/JC316_2006/100_8308.jpg http://i108.photobucket.com/albums/n10/JC316_2006/100_8309.jpg 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. You can find Prime 95 here: http://www.majorgeeks.com/Prime95_d4363.html And Memtest here: http://hcidesign.com/memtest/download.html And Realtemp here: http://www.techpowerup.com/realtemp/ And HWmonitor here: CPUID HWMonitor If this guide helped you, there is a thanks button at the bottom of this post For a more indepth guide, see XVI's guide here: A Beginner's Guide to Overclocking And Kursah's guide:Overclocking is Easy! Get Results!