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Does this PSU have enough power to run HD 6870 Crossfire?

Last response: in Graphics & Displays
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March 13, 2012 6:21:25 PM

Hello,

http://www.microcenter.com/single_product_results.phtml...

This is the psu that I have, and I was wondering if I can run radeon 6870 in crossfire? The specs say that it is "crossfire ready"

Comments?
a b U Graphics card
March 13, 2012 6:27:55 PM

Simple answer: yes it will. Is it the best choice, Not really.
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March 13, 2012 6:30:13 PM

I mean, I already have 1 radeon hd 6870, and I was wondering if I could get another with this psu. I'm running a p8z68 v gen-3 1155 atx mobo and i5 2500k
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a b U Graphics card
March 13, 2012 6:31:56 PM

Yes it will work.
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a c 564 U Graphics card
March 13, 2012 6:37:01 PM

For a system using two Radeon HD 6870 graphics cards in 2-way CrossFireX mode AMD specifies a minimum of an 600 Watt or greater power supply. The power supply should also have a combined +12 Volt continuous current rating of 45 Amps or greater and have at least four 6-pin PCI Express supplementary power connectors.

Total Power Supply Wattage is NOT the crucial factor in power supply selection!!! Total Continuous Amperage Available on the +12V Rail(s) is the most important factor.

If you are overclocking the i5-2500K you will need to add the appropriate amount of amperage to the combined +12 Volt continuous current rating based on the magnitude of your overclock.

The OCZ ModXStream Pro Series 600W (OCZ600MXSP), with its combined +12 Volt continuous current rating of 42 Amps and with one 6-pin and one (6+2)-pin PCI Express supplementary power connectors, is insufficient to properly power your system configuration with two Radeon HD 6870 graphics cards in 2-way CrossFireX mode and with CPU overclocking.
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a b U Graphics card
March 13, 2012 6:44:27 PM

EDIT : I would trust a Seasonic or Corsair 600W PSU but I'm not sure about yours.
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a c 254 U Graphics card
March 13, 2012 6:45:29 PM

AMD recomends a 550w psu for just one 6870 so with a 600w psu you are pushing it to get it to work and I would say you need a 700w or bigger for crossfire.
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a c 564 U Graphics card
March 13, 2012 6:49:44 PM

diec4st said:
EDIT : I would trust a Seasonic or Corsair 600W PSU but I'm not sure about yours.

It would be enough if you don't overclock the CPU and GPUs and you never run Furmark or OCCT GPU:3D stress testing but I've learned to never make that assumption.
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August 16, 2013 7:28:08 AM

Yes, i will work but You will be border to system crashes.
For 1 6850, it's ok, but twice. If you plan to overclock a little, your system will be unstable.


So, No !, for CrossFire with 6850,
Try to choose something greather or equal to 750w.

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