Can I run a Hd radeon 5770?

if your motherboard is attached to one rail, the one pci-e power connector to the other it will work. That way it can draw from both rails

Its the combined 12v rating that you're looking for, and I would suspect that with 2x25A max rails your combined 12v output will be about 40-45A. A 5770 is only spec'ed for about 110w peak draw. 110/12 = 9.2A - and they never use this much in the real world anyway. The 30-40A is a total system rating and basically covers the manufacturer for you putting one in a overclocked quad core system with about 80 HDDs and a million fans, or one with a cheap PSU.
Bottom line is OCZs are fairly good and you can run a 5770 easily with that PSU - you could crossfire 2 of them even.

That's a very similar PSU to what I'm using, and I run a 5770 perfectly fine.

You shouldn't have a problem with your PSU being able to supply this card.

Ok, thanks. I was wondering if anyone has used the MSI 5770 before, because its on sale at Fry's right now, but one of the Newegg's review says the fan sucks and temperatures are pretty high.

http://www.frys.com/product/6139339#detailed

http://www.newegg.com/Product/Product.aspx?Item=N82E168...

You cannot draw more than 25 AMPS from a 25 AMP rail. That's why they call it a 25 AMP rail. There is much mis-info around on PSUs.

I not sure other's brand.
I have Sapphire HD 5770 Vapor-X, and it works nice on cooling.

38°C on idle, and never over 60°C during game like L4D.

Best answer selected by darkslash_323.