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New sli cards

what's the rest of your system?

worst case scenario two overclocked 470's at 100% GPU usage will be around 500W, rest of your system would have about 250W left...

really I'd expect the Hiper you have to be fine
 
470 SLi very good cards alotho they get hot (105C) in my case but its not a aircooling case and will be putting them under water soon. very very fast crysis @ 1080x1900 looks soo good maxed out with no stuttering what so ever. Didnt look at what i was getting because i was too busy slevering over the sheer picture quality :D
 
Whilst overclocking my 470's I melted my 24pin ATX connector into the socket of the motherboard, killing both of them in the process, this was with a Coolermaster CM850, which I'd been told would handle it "easily".

This is a known issue when overloading a PSU with high end graphics cards, it's up to you at the end of the day but I'd rather get a PSU that'll definitely work than risk it and end up buying a new PSU AND mobo.
 
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