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How much wattage? Do YOU know?

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Last response: February 4, 2012 7:31 AM in Components

JDriggers

February 3, 2012 10:21:50 PM

Okay, I have:
-Phenom II X4 3.2ghz Black edition
-650W Corsair PSU
-Radeon HD 5770
-1 HDD
-Coolermaster Hyper 212 Evo
-Crosshair V Formula MoBo
-DVD burner
-thats all the relevant stuff

**I plan on overclocking to 4.2Ghz**

I want to get a Radeon HD 6770 to crossfire with but some of my friends tell me I need a power supply that delivers more wattage.
But I personally am skeptical. I think that 650W will work fine (I may be wrong, this is why I'm asking you pros!)

Do I need a bigger power supply before I get another GPU for crossfiring?

Thanks, Ben

More about : wattage

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bak0n

February 3, 2012 10:40:56 PM

Pick up a Kill a Watt. You'll know exactly what the power draw is.

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clutchc

Power supply Master

February 3, 2012 10:58:10 PM

The 650W Corsair may be enough, but use a PSU calculator like this one to be sure.
http://www.thermaltake.outervision.com/

There's a place in the calc to plug in all the valuse pertaining to your system, including Xfire HD 5770s.

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JDriggers

February 3, 2012 11:21:50 PM

i'm getting 450W on the calculator. I think I'm good to go without buying another power supply. I just want another video card to tide me over until i save enough for a new Intel build.

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clutchc

Power supply Master

February 3, 2012 11:27:41 PM

Did you include Xfire in the calculator? If so, you should be good. The AMD Xfire chart says the HD 5770 and HD 6770 will work together in Xfire, so that issue shouldn't be a problem. I was a little concerned about the 2 not being compatible.
http://sites.amd.com/PublishingImages/Public/Graphic_Il...

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davcon

Power supply Master

February 3, 2012 11:48:02 PM

JDriggers said:

A Corsair 650W psu can handle two 5770's no problem!

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Best solution

randomkid

Power supply Expert

February 4, 2012 12:15:00 AM

JDriggers said:

some of my friends tell me I need a power supply that delivers more wattage.
But I personally am skeptical. I think that 650W will work fine (I may be wrong, this is why I'm asking you pros!)

Do I need a bigger power supply before I get another GPU for crossfiring?

Thanks, Ben

Your Corsair 650W is fine. I crossfired 6950 in a Corsair HX620. But of course I did it after I checked with the outervision power supply calculator & reviews that indicates my HX620 can handle sustained 750W.