Which one to use? 3:4? or 1:1?

would it make a difference? which one to use?

3-11-3-3 @ 1.8v 333mhz
4-13-4-4 @ 1.8v 400mhz
5-18-5-5 @ 1.8v 555mhz

that's my ram advertised timings... I tried using 1:1 400mhz and 3:4 533mhz. It looked like 1:1 was faster. Is it just my imagination?

I would think they would be about the same. 400MHz is slower frequency, but the timings are tighter. I would just stay at 1:1 for the lower timings.

I use 1:1 for high fsb (500-580ish). Other then that, I pretty much always keep it on a divider, and run em fast, with a lowish PL and a few other tweaks heh.