monikanth :
Thank u for your reply. That means i can't use DDR3 RAM?
Also If i can't get a Mobo for this processor ( Athlon X2 3600+), are there any best Processor + Mother board around $120?
I Always Liked The Tried And True Nvidia Nforce4 Chipset, These Can Be Had For WAY Less Than $120.00 (More Like Around $40.00) I Would Suggest Using The Leftover $$ To Get As Much RAM As Possible, Even Older Machine Will Run Smoothly With Enough RAM, As A General Rule MAX IT OUT, Nowadays 2GB Barely Cuts It, 4GB Is Better, But Id Reccomend At-Least 6GB. Within Limits; You Can Never Have Too Much RAM, Just Dont Get Redculous 8GB Is A Nice Round Number.
And No, No DDR3 (In Reality DDR3 Actually Looses To DDR2 When It Comes To Older CPUs; Athlon Series, Semprons, Pentium 4 Etc. In Witch They Prefer Lower Latency Over Higher Speed.)