650w for sli cards

[dylwing23]

I was looking into getting this psu http://www.newegg.com/Product/Product.aspx?Item=N82E16817151088
and was wondering if it would be able to power a OC'd i5 3570k at 4.5ghz and either sli gtx 670 or 660ti (think these both use less that 200-150w or so). Also have 1 hdd, 1 ssd, 5 or so fans. If you think that 650w is good just let me know or should I try to move up to a 750w one.

 

[clutchc]

That's a fine PSU, but 650W is marginal for a pair of GTX 670s. Especially if you have a lot of other devices that need power from the PSU. I don't have amp specs for the 670s but a pair of 570s draw almost 42 amps on the +12V rail maxed out. The Seasonic is probably a better PSU than most, so I may be being overly cautious. Use this PSU calculator to see what everything in your system would require.
http://www.thermaltake.outervision.com/

 

[abekl]

Use the calculator, but I'll bet you come up short or close to short with that PSU. I think you'll need to look at something closer to 750 Watts to have a comfortable margin.

 

[dylwing23]

Best answer selected by dylwing23.