Need help overclocking e4400.

[Fidelio]

Hi, I just bought a new computer with the following components:

CPU INTEL|C2D E4400 2.0G 775 2M R
MEM 1Gx2|G.SK F2-6400 DDR2800
EVGA 8600GTS 256MB
THERMALTAKE 430W Power Supply
GIGABYTE GA-965P-DS3 P965 775 F10 BIOS ( I have tried F12 and F11)
ARTIC COOLER 7 PRO
WINDOWS VISTA x64

I have tried many times to overclock the CPU and every time I am able to achieve the clock, however the computer runs 2-3x slower than it did without the overclock. The only thing I am changing is the CPU frequency and the RAM multiplyer and disabling the CPU limiting functions in the BIOS.

Does anybody have any ideas about what I am doing wrong or what I need to do or anyone with a similar setup care to share their BIOS settings? Any and all help is greatly appreciated.

[stncttr908]

Very strange. We basically have the same systems (E4300 here, 4GB, DS3 w/F11 BIOS) and I'm running great @ 3.2GHz. Have you checked CPU-Z to verify the OC took effect?

[Fidelio]

Yes, I have checked and it is running at the new speed, it is just incredibly slow. Everything loads slow and scrolling through a windows is choppy.
I have tried many different FSB and CPU frequency changes from 2.2 to 3.2, all of them running slower than before. I try to keep the RAM at around 800mhz.

Perhaps it is the memory or voltage, I left all those on normal. I have tried changing the timings to 5-5-5-12 and 4-4-4-12, but it didn't seem to help.

I checked the Task Manager and it seems to always be at over 50% CPU usage when I overclock, even when it is not doing anything. If that is the problem, any ideas how to fix it?

[Fidelio]

I think I have it figured out now. The CPU will overclock, however I cannot disable EIST, when I disable it the computer boots and runs very slow, it does this even when I have not touched the BIOS settings.

Anybody know what the problem is?