Corsair XMS pc-4000..help

just playin with OC'ing for the first time...heres my system specs

soc754 AMD64 3400+ clawhammer
Thermaltake 560watt PS
Thermaltake Venus-12
gigabyle K8NS-800PRO nForce3 250
corsair XMS PC-4000 model TWINX1024-4000PT
Leadtek GeForce 6800 GT @415mhz 1100 (and stable)
1 WD raptor 74gig, 1 WD raptor 36gig

just wondering if anyone has played with timings and voltages on a similar setup and if anyone needs more specifics on processor ETC let me know thanks in advance

I would drop the multiplier down to 9, set the FSB to 250, for a speed of 2250. That's not too far of a jump and you can see how much farther you can push the memory from then on.