I'm about to build a PC for the first time, but I have one doubt about what PSU I should buy. If you guys don't mind I'll use the New System Build guide to tell you the parts I'm thinking of buying.
APPROXIMATE PURCHASE DATE: This week
BUDGET RANGE: 600-750
SYSTEM USAGE FROM MOST TO LEAST IMPORTANT: Watching movies, surfing web, gaming, listening to music
PARTS NOT REQUIRED: Keyboard, mouse, monitor, speakers, already got 2 HDD's: WD Green 1TB HD & WD 160GB 7200RPM HD
The GTS 250 will hamper your gaming significantly. It will be fine for watching movies and surfing the web however. I agree with mac_50, invest a tad more and get a 5770. Better future proofing, better power usage, better performance. Plus, if you want to crossfire in a year or two you will be able to find 5770s but probably not GTS 250s.