upgrading my am1201

Buy the AMD Phenom X4 9750 Quad Core Processor at TigerDirect.ca is the processor i am looking at i dont really know what mobo i have and looking for some cheapish alternative to a speed boost using mostly stock well kinda got a nivida gts 250 1gb oc and vista home premium 32 bit mostly goin for gaming but not alot of funds with a child n all and i am going to upgrade my psu but dont know what size i should get and my pc is a acer am1201 windows rating is 5.2 cause of prcessor but everything else is 5.9 but it is real slugish now and virtually clean like 3 games and some base programs and music total of 23 gigs used outta the 320 and takes like 5min to boot up now and i just wiped it like a week ago and made no difference to boot speed ran all the clean ups including nortons and i thought it was norton slowin me down but even after wipe and no norton still plugin it lol i am pretty sure taht processor will work but this is my first time upgradin a pc so kinda new but i know a bit not fully but got some knowledge anyways this is long

lol i posted thin in video cards lol oops but it works atleast i mentioned my card :P