basically, checked ur wattage for ur PSU(power supply unit)
check if ur com is a slim line case. mine is, so i can only fit in small cards.
if ur com has like 300W and ur getting 400W card, my guess if ur card would overheat easily and gives u shit. so proper wattage counts. (my card was 350W, com is 300W, abit of difference. but still work-able)
want suggestions for which card to get, head on to the hardware section.
yeah dual pentiums are kinda sucky use gamebooster and turn off all the background apps you can
ASRock 970 Extreme 4
AMD Phenom II X6 1090T @ 4.5ghz 1.45v
G.Skill Ripjaws X 1333mhz
HIS Radeon HD 5750 1gb GDDR5 Pencil mod Superclocked 1ghz
Western Digital Caviar Blue 500gb
Seasonic 620w PSU
Windows 7 Ultimate 64bit