Need some help with my mem timings

I had my 2500 barton OCed to 2.2GHz, my memory timings were at 2.5 3 3 11, and everything seemed to be stable. I changed my heatsink yesterday and when I cranked it back up the BIOS went haywire and I had to flash my BIOS. So Im am now embarking on my second attempt at OCing.

Anyway, I noticed on newegg that in the item specs it says:

Specification
Manufacturer: Geil
Speed: DDR400(PC3200)
Type: 184 Pin DDR SDRAM
Error Checking: Non-ECC
Registered/Unbuffered: Unbuffered
Cas Latency: 2.5 6-3-3
Support Voltage: 2.55V-2.85V
Bandwidth: 3.2GB/s
Organization: 64M x 64 -Bit
Special Features: With Extreme Performance Heat Spreader
Warranty: Lifetime

and was wondering if it would be best to set my mem timings @ Cas Latency: 2.5 6-3-3Support Voltage: 2.55V-2.85V

If the SPD on your memory is 2.5-6-3-3, I'm not sure I understand why you were running it at 2.5-11-3-3, but I doubt it'll make any difference in speed. Does your motherboard automatically detect the memory timing?

tRAS timing is a tricky timing that lacks the impact on performance as the other three more common timings (tCL, tRCD, tRP). If I were you, I would do fine with 2.5-3-3-11 timings - with a nF2 chipset it may offer you fractionally better performance then 2.5-3-3-6 either way.