how much power needed?

[grazhopper]

So I am buying a computer with a GTX 275, i7 920, 3GB DDR3, and x58 mobo, how much power do I need to run this thing. I was thinking 500 watts is this enough??

 

[smoothforprez]

you would need at least 550w for the card alone so i would say get atleast a 650w or a 700w for sure

 

[linkin]

I wouldn't go below 650 for that kind of set up... because an i7 and a 4870 draws just under 500w, and it isn't good for a PSU to be near full capacity at all times. might go 750w to be sure.

 

[Geoff]

No point in guessing.

http://www.extreme.outervision.com/psucalculatorlite.jsp

 

[WeatherMan]

No point in getting inacurrate results either

 

[daisymtc]

http://www.anandtech.com/video/showdoc.aspx?i=3679&p=16
Full load 371W. good 500W PSU work at 80% efficiency would be OK
Probably best get to 550W

two way SLi - full load 643W
850W is needed