Right then, this might be a long shot, but I have to try as I'm getting UBER frustrated!

I just got a new motherboard so I could overclock my E6400 Core 2 Duo.

I got the Abit IP35 Pro XE.

Aaaaanyway, I changed the hardware, all was well.

I started tinkering with the settings and managed to take my cpu from 2.13ghz to 3.2ghz and then to 3.5ghz and all was running well.

Anyway, I updated the bios, and as such had to reset the overclock configuration as I hadn't saved a profile.

But I now cannot get above 2.8ghz overclocked.

I have downgraded my BIOS and honestly tried all the setting under the sun including voltages, multipliers, CPU:RAM ratios, Ram timings, Northbridge Voltages and so on, but I cannot, no matter what I do, take it above 2.8ghz :(

Does anyone have any ideas? PLEASE!!??

Specs:

Abit IP35 Pro XE

Intel E6400 2.13ghz Core 2 Duo

4x1 GEIL Black dragon, 1066mhz DDR2

Noctua NH-U9B Cooler

8800GTS 320mb

Sounds rather a large clocking increase to me? Is that not likely to kill the machine rather quickly?