4gb will be just fine. Which motherboard is it, and will you need a case/psu/hard drives etc? If its 350 for just the board, ram and processor that's not such an amazing deal
hi full system
q9650
x38 - dont know which one likely a generic one
4gb corsair 800mhz
8800gt
400w generic psu - should be fine as not gaming + if im going budget might aswell do it right
1tb hdd
dvd/cd
compact case - i think it a silverstone matx