How much power do I need?

[Ka0skrew]

I'm thinking about getting a Nvidia GTX 285 with plans to upgrade to dual 285s in the future. My basic plans is to get an I7 processor, a newer mobo and a single GTX 285 then later as prices drop I'll upgrade the processor and add an additional GTX 285 to run in SLI. Any thought on if this is a good idea?

If it is, what kind of PSU power am I gonna need.

 

[dragonsprayer]

850w is fine 1000w is ok and 750 with dual will work but not as effiecent with dual cards

then again, almost nobody upgrades and everyone says they will - the 285 will rip it -- go 750w