is it my memory?

i set an fsb of 140 and it booted up fine and passed 3damark, when i played cs i got a random reboot so i changed dram clock from 166 to 133 and never had any more probs, i am now at 143 and still haven had probs passes 3dmark easy.. i am thinking about getting a 512mb corsiar xms pc2700 stick, may this be better for overclocking?

Better RAM is always BETTER.
For OCing, RAM can be a deciding factor.
All your answers are in these forums.
Just SEARCH for them.

Oh, as well, what type are you currently using and then mabey we can compare it and Corsair, but Corsair is a good bet.

i am currently using samsung pc2700

CTL or DTL? If I remember correctly, DTL doesn't perform as well as CTL.

~THT