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850w PSU enough for Crossfire 2gb 5870s eyefinity 6 editions

Last response: in Graphics & Displays
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May 28, 2010 3:59:28 AM

I currently have a 850w Thermaltake PSU Crossfire certified It has the appropriate connections http://www.newegg.com/Product/Product.aspx?Item=N82E168...

Ati is not making much sense to me right now.

Crossfire 5970s ATI recommends 850w psu. 5970s used 300+ watts each. According to ATI "650 Watt or greater power supply one 75W 6-pin and one 150W 8-pin PCI Express® power connectors recommended (850 Watt with two 75W 6-pin and two 150W 8-pin connectors for ATI CrossFireX™ technology in dual mode)"
http://www.amd.com/us/products/desktop/graphics/ati-rad...

Crossfire 2gb 5870s ATI recommends 900w psu but they only used 228 watts each."600 Watt or greater power supply is recommended with one 75W 6-pin and one 150W 8-pin PCI Express® power connector required (900 Watt and 2 6-pin and 2 8-pin connectors for ATI CrossFireX™ technology in dual mode)"
http://www.amd.com/us/products/desktop/graphics/ati-rad...


If my psu will run 2 5970s won't it run two 2gb 5870s? Just trying to avoid forking over for a new 1000w psu.

Best solution

May 28, 2010 4:07:12 AM

2 5970s will consume 600w
2 5870s will consume 376w
2 5870 2GBs will consume ~440w

Yes, you will be perfectly fine with that.
I run 2x OC'd 5870s on a 750W Corsair + OC'd PII 965. No problems.
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May 31, 2010 3:03:25 AM

Best answer selected by brennon7.
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