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Author Topic: 1,000 Watt PSU for 3x 6970's?  (Read 2616 times)
digitzero
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July 05, 2011, 09:30:59 PM
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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, it says I would need 1168 Watts.  Hoping to get by with less, if possible.

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Jack of Diamonds
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July 05, 2011, 09:47:50 PM
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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.

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digitzero
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July 05, 2011, 10:00:39 PM
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Thanks!  As for overclocking, any idea on how much that would bump it up from the 800 W level?
Jack of Diamonds
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July 06, 2011, 02:55:00 AM
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Add 50-75W overhead for every card if OC'ing significantly.
So around 950 watts max for the entire system

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July 11, 2011, 03:04:44 AM
 #5

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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