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Is this PSU enough for crossfire? v. i7

Forum Homebuilt Systems : General Homebuilt - Is this PSU enough for crossfire? v. i7

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carlostheelf   08-19-2009 at 12:46:27 AM

cpu: i7 920 d0
mobo: msi x58
gpu: 2 x xfx 4890hd
ram: corsair 6gb hdd3
psu: http://www.newegg.com/Product/Prod [...] 6817139005
Corsair 650w

A lot of people on the forum say, "Be safe, get a 750w," but others say it's plenty for crossfire and that I shouldn't worry.

Should I worry, since I already bought it. :fou:

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Silver Home Brew badge shortstuff_mt   08-19-2009 at 12:59:01 AM

That would be pushing the PSU pretty hard. The PSU also only has 2 PCI-E power connectors, so you will need to use adapters for crossfire. If Corsair had meant for it to power 2 GPU's that both needed 2 PCI-E power connectors, they would have made it with 4 PCI-E connectors. That's how I see it anyway. The 750TX has plenty of power and the required 4 PCI-E power connectors. I certainly wouldn't use the 650TX in that system with crossfire 4890's.

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carlostheelf   08-19-2009 at 01:44:04 AM

It's offered as Crossfire and SLI ready. I know I would need to use the adapters but it comes with them. Corsair also has a reputation for having very under rated PSUs and it's either split down the middle. Either it can handle 2 X 4890s, or it can't at all. I'd hate to believe it can't. Either way, I think I'd like to try. I also really don't want to buy another PSU lol.

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Silver Home Brew badge shortstuff_mt   08-19-2009 at 01:46:57 AM

You're right, Corsair PSU's are excellent and are under-rated. I'm sure it would power the system, but it sure is cutting it a lot closer than I'd ever cut it, especially with an i7 system.

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