umm rip ur side panel open and check inside to see what power u have.
power for gts: ocz 450w will do fine (
msi gts maxload - 199watts) for one gts, if u wanna do 2sli then minimum +600w
gts: i recommend ASUS 8800gts 512mb - good quarantee(3years?)
-my setup now:
650w SLI-ready
ocz power,
amd 6400+x2(maxload 125watts),
asus 88gts, 2gigs ram
