Going SLI - PSU requirement?

[jarvis82]

Morning.

I have decided that I'd like to make use of my SLI capable motherboard and buy another 1GB 460.

However, what kind of upgrade would I need in terms of PSU? Currently running a 650W, so am guessing that a 750 or 850 would be sufficient?

Not got any super hungry peripherals and such like. Break down of system is as follows...

i7 930 (not overclocked)
X58 Mobo
GTX 460 1GB
6GB DDR 1600
64GB SSD
1TB HDD
1 x wireless network card
2 x DVD drive
1 x 140mm chassis fan, 2 x 120mm fan (1 chassis, 1 CPU cooler)

Any advice appreciated.

Regards.

 

[HazardO]

You might just about get away with the 650w psu if it's a good one, but any overclock on the CPU would probably be a step too far. I've got a 4GHz i7 920 and a pair of GTX470s on an 850W corsair HX, which is probably a little overkill. A quality 750W would easily handle your rig without being above 90% capacity.

 

[hallmeister]

Check out this article: http://www.anandtech.com/show/3810/nvidias-geforce-gtx-460-part-2-the-vendor-cards/1

There are power numbers for stock and overclocked. If everything is at stock you should be OK with your current PSU. (Note the CPU in these tests is running a 25% overclock so will draw more power than your stock 930)