Ok guys real simple here i want to overclock my CPU to about 2.6 - 2.8Ghz on the Intel Core 2 Duo. It currently is @ stock speed of 2.4Ghz.

Mobo: Gigabyte 965P-DS4 - fairly decent mobo with silent pipe and solid capacitors.
RAM: Corsair PC6400 800Mhz 2x1GB Dual Channel

I only have the intel stock cooler and a 430Watt Thermaltake PSU.
I currently run a Gainward 7900GS 512MB Card.

Basically i need to know what i need to change in the BIOS to make it work, i have tinkered around but i don't know what i'm really doing in their so i'll leave it to the pros before i do damage.

Also if i'm tweaking the CPU do i need to also tweek the RAM?

Anyway thanks in advance

PS, i have read the 1.1 for overclocking to 3.4Ghz but the numbers are not for 2.6-2.8 so i'm not risking it.

I have a DS3, so I'm gonna assume you have a really similar BIOS.

1) Go into bios. Press Ctrl-F1 to enable all options. Disable the stuff in the BIOS that wusy's 1.1 guide says. You can try enabling EIST and C1E after you overclock if you want to save power, but it might not be stable (it worked fine for me)
2) Go into "MIT Motherboard Intelligent Tweaker"
3) Set CPU HOst Clock Control to Manual/Enable
4) Set the "System Memory Multiplier" to 2.00. If you want to know the memory:FSB ratio, divide this number by 2. So 2.00/2=1, which is a 1:1 ratio. The CPU speed matter much more than memory speed as far as system performance, so you want to overclock your CPU first and make sure the memory isn't a bottleneck.
5) Set DRAM Timing Selectable to manual/enable. Loosen the first four memory timings, so if your RAM runs at 4-4-4-12 timings, set it to 5-5-5-15. (This isn't that necessary unless you overclock a lot)
6) The CPU multiplier should be set to 9.
FSB=CPU Host Frequency
FSB*Cpu multiplier=CPU speed.
Therefore, you must raise the FSB in order to raise the CPU speed. Raise the FSB ~10MHz at a time until your system is unstable. Then lower it to the fastest stable speed.
At stock volts you have very little risk.
If you can't boot up, reset the BIOS (this should be in the manual)
I noticed that, with my DS3, often when I could not post, the Mobo automatically reset everything in MIT except the volts, so that's a really convenient feature. Make sure that, if you reset the BIOS, disable all the stuff again in step 1.
7) Now that you have your highest stable cPU OC, you can lower the memory timings and overclock the memory if you want by changing the memory:FSB ratio (i.e. the System Memory Multiplier)

If you are afraid of OCing risks, I recommend just OCing as high as you can with stock volts.

Hope this helped.

So, you didn't understand sh!t

thanks alpine_sc i will try what you said, fairly easy to follow. I did try a small tweak last night and got the CPU to 2.66Mhz, I then loaded CPU-Z and realised that my CPU idles at 1.7Ghz but when i launch a program it suddenly changes to 2.66Ghz, so i guess if i turn off the extra features in guide 1.1 this will not happen.

But i think to my self having the CPU go from 2.66Ghz - 1.7Ghz means it saves power isn't this a feature you would won't on to ensure a longer life span on the CPU? Or it doesn't really matter when i do a small overclock as i have done.

I also noticed that my RAM CL values changes automatically when i made my FSB higher for the CPU. Also one last thing i noticed on CPU-Z is that i can't select CPU1 drop down menu in the first tab down the bottom, is this also a result of not unlocking CPU BIOS option in guide 1.1

Thanks for your help.

i guess not lol

By CL you mean Cas Latency?
The drop from 2.66GHz to 1.7GHz is the Enhanced Intel Speedstep Technology (EIST). Look it up. It's purpose is to reduce power usage.
For the CPUz problem, I think the selection is for processors, not cores; so unless you have two CPUs in your system, you can't select the drop down menu.