Overclocking an E6750 slowing down my computer?

[gtf6]

Hi. long time reader but first time posting.

I have
E6750 2.66GHz @ 3.2
4GB RM 667 @ 800
8800 GT 512 ASUS
550W PSU
Win XP 32-bit
GIGABYTE GA-P35-DS3L
Using Easy Tune 6
The overclocked temp is about 45c at load.

I tried increasing the FSB from 333 to 400 and that gives me 3.2 core speed, and it automatically sped the ram up to 800MHz. and general windows use seems faster.

But whenever I run a performance test on a game, the results are much worse.
e.g
Crysis CPU test is usually 28.5ish on average (1680x1050 High noAA)
But when the CPU is upped to 3.2, the result drops to 24ish.
And the same happened to devil may cry 4 demo. (1680x1050 max 8xAA) It went from 65/ 47/ 79/ 47 all the way down to 55/ 38/ 63/ 38.

Why? And how do I fix it?

 

[macer1]

nope hat cpu is very nice, the 8800 gt mixed with crysis **** code = bad news

 

[gtf6]

The 8800 gt plays crysis fine at 1680 x 1050 with no AA. and im about to get a ECS 9800 GTX+

 

[JDocs]

Could be the ram that doesn't like 800mhz? I'm guessing here but if it made 800mhz stably/properly it would've probably been sold as that.

I've also encountered a similar situation where the motherboard internal timings / straps for a set FSB slowed things down since the overclocked components didn't like them.

 

[bdcrlsn]

Does your CPU have sufficient cooling for its overclock?

 

[gtf6]

Yeah, everything stays below 45c, except for the 8800gt, it gets up to 55cish at load.
And I just turned off that cpu 'reduce speed when not doing much' thing in the BIOS.

Oh, and I think the performance is better in games, because the GPU test in crysis takes 66.66 seconds if the average frame rate is 30. and it took 66.27 to do it.

But the frame measurer thing in crysis said that the average was 22ish, but you can tell that it's running much faster than that.