Enough power for the system?

[IRISHxINSURGENT]

Hello, I was planning on building a computer sometime soon, but I just would like to know one thing, I'm planning on getting a Geforce gtx 570 but later on I would like to put another in for SLI down the road. Just so I don't need to change the power supply later, what would be a sufficient amount of wattage for two gtx 570's?
I put a 750w PSU in it, but I was wondering if I could go lower. Here is the list of every product in the build.

http://www.tigerdirect.ca/sectors/wishlist/wishlist.asp?WishId=13AB24EC-EB84-45C8-AD8F-2C76A901D0BD&Desc=kj


Thanks!!

 

[nekulturny]

750watt is pushing it. I wouldn't go lower, if anything, I'd go higher. But it should be sufficient for 2 of them.

http://www.bit-tech.net/hardware/2010/12/07/nvidia-geforce-gtx-570-1-3gb-review/9

 

[e56imfg]

This page shows that even with a power hungry 965, the whole system pulls 330W from the wall.

The 570 has a TDP of 219W, or 18.25 amps. If you multiply that by 2, you get 438W just from the 570s in SLI, or 36.5 amps. The rest of the system draws less than 150w so that leaves you with about 588w on load. A quality 750W PSU will be fine.

Check my sig for more PSU options.