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650W PSU Enough for Crossfire ? - Page 2

post #11 of 24
I wouldn't do it, but thats just me...
    
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post #12 of 24
Thread Starter 
Quote:
Originally Posted by bluedevil View Post
I wouldn't do it, but thats just me...
Wouldn't do what and why mate ?
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post #13 of 24
ATi recommends at least a 600w psu particularly for two 4870's in CF. Yeah, I'd say you're good.
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post #14 of 24
Give it a try, If your rig shuts down when you OC them you will know. When I first set up my 4870s They would run fine at stock setting but shut down as I OC'ed. It was from lack of good solid PS and this was with an Ultra X2 750w.
    
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post #15 of 24
Quote:
Originally Posted by Prong View Post
Wouldn't do what and why mate ?
What I meant was, get a new PSU in the 700-800w range if you go Crossfire. I like having power if I dont need it rather than not have it and need it.
    
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post #16 of 24
Before upgrading my VGAs, I had a Hyper Type-R 580W. It was supposed to handle up to 630w peak. I had to change it, because mi Quad didn't like it. With the Quad overclocked to hell, 6 hdds, 2 DVDR, all the fans, and both 4870's... It became unstable at all when playing. I had to play with CF disabled.

Now, I've got a Hyper Type-R 880W, that can handle 930w peak. I measured the power consumtion of my PC with a Fluke tester, and it was drawing 3,2Amps x 230v = 736w.

I did the test while running FurMark (renamed), prime95, copying some files from HDD to HDD and copying the information from 2 DVDs (one per device) to the HDDs. Now I know that it has room for 150W more.

Regards

(Sorry for my english. I'm Spanish )
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post #17 of 24
Thread Starter 
I will give it a try. Realized that lots of people out there running 4870's in cf without any problem w/600-650W psu's that are worse than mine. If I oc them both and have any issues then I will consider upgrading to a new psu and probably at least 1000W to be more future proof.
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post #18 of 24
Since no one answered your question, since you already got an adapter, you won't need another. My PSU didn't come w/ another adapter, so you're all set. I just still like the fact of having enough cables w/o adapters/modifications.
 
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post #19 of 24
Quote:
Originally Posted by OverclockTheStock View Post
unless the psu is 100 percent efficient.
Error.

Theres no such thing as a 100% efficient Power Supply, maybe in uranus.
    
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post #20 of 24
My card came with 2 adapters. One from standard molex to 6 pin, and another from 6 pin to 6 + 8 pins. Mine are Asus Retail, bought in August.

I keep on saying that it wouldn't be enough to handle all your hardware. Just make the test I did, with a multimeter or a Magnetic amp meter (Is a ring that you place around the power cable of your PSU).

RGDS
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