RAM holding back overclock

[Shadowness]

Here's the situation, my E6600 is currently at 3600Mhz (400x9) at 1.55V. It's run for two hours on orthos perfectly stable, so I stopped the test.
So Im confident its pretty stable, BUT the RAM timings arent what Id like them to be.
Im using GeIL PC6400 (2GB), and at this overclock they are running at 400Mhz, ie. their default setting, but in the bios I cant get a post if I set the timings to default too (4-4-4-12).

My question is, why would the RAM be affected by this? And if I lower the timings to default, I dont get POST?

P.S. I have tried setting the VRAM to max at 2.3V too with no luck

 

[pegasus1]

Here's the situation, my E6600 is currently at 3600Mhz (400x9) at 1.55V. It's run for two hours on orthos perfectly stable, so I stopped the test.
So Im confident its pretty stable, BUT the RAM timings arent what Id like them to be.
Im using GeIL PC6400 (2GB), and at this overclock they are running at 400Mhz, ie. their default setting, but in the bios I cant get a post if I set the timings to default too (4-4-4-12).

My question is, why would the RAM be affected by this? And if I lower the timings to default, I dont get POST?

P.S. I have tried setting the VRAM to max at 2.3V too with no luck

My Geil sticks are set for 5,5,5,15 but to be honest, tighter ram timings have no noticable effect with your kit.