Don't worry about changing ram timings on an AMD 64 cpu, it honest to god won't make a 1% difference. Stock are fine, if you can POST with lower, congrats. I was running my 512mb kingston stick at 2-2-2-5 with no problems, then I dropped in my 1GB Samsung stick, turned them up to 3-3-3-6 (Yeah yeah, not that big of a change, but it's stable) and I get almost the same performance. The sticker on it says 4-5-5-8, so I put it up there, no difference. Yes, I am rambling, but I have 9 minutes left of my shift and I'm very bored.