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Title: 1,000 Watt PSU for 3x 6970's? Post by: digitzero on July 05, 2011, 09:30:59 PM CPU: AMD Sempron 140
CASE: open (n/a) HDD: 16 GB SSD 3x ATI 6970's (slight overclock) Do you think I can reliably run 3 of these ATI's on a 1,000 Watt PSU? Using Newegg's Power Supply Calculator (http://c1.neweggimages.com/BizIntell/tool/psucalc/index.html?cm_sp=Cat32_PowerSupply_left-_-PowerSupplyFinder030510-_-http%3a%2f%2fpromotions.newegg.com%2fproductfinders%2fpowersupply.jpg), it says I would need 1168 Watts. Hoping to get by with less, if possible. Title: Re: 1,000 Watt PSU for 3x 6970's? Post by: Jack of Diamonds on July 05, 2011, 09:47:50 PM A 6970 consumes about 250 watts at full load. At most, your entire system would be consuming 800 watts.
The newegg calculator is being overly cautious. Title: Re: 1,000 Watt PSU for 3x 6970's? Post by: digitzero on July 05, 2011, 10:00:39 PM Thanks! As for overclocking, any idea on how much that would bump it up from the 800 W level?
Title: Re: 1,000 Watt PSU for 3x 6970's? Post by: Jack of Diamonds on July 06, 2011, 02:55:00 AM Add 50-75W overhead for every card if OC'ing significantly.
So around 950 watts max for the entire system Title: Re: 1,000 Watt PSU for 3x 6970's? Post by: organofcorti on July 11, 2011, 03:04:44 AM I have a set up similar to yours, except with 1x6990 and 1x6970 and I use an 850Watt PSU. I ran both OC'd for a while, not problem with power. Way too much heat and noise to run OC'd for long though.
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