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Author Topic: 1500w silverstone psu safe for 4 x 5970?  (Read 849 times)
critical
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August 25, 2011, 12:03:15 PM
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1500w silverstone psu safe for 4 x hd5970?

anyone know

thanks
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Technocrat
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August 25, 2011, 12:23:29 PM
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They are about 300W each so it should be enough.
Check the maximum 12V output for the PSU.
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August 25, 2011, 12:49:15 PM
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i think 5970 uses 300+ electricity for each, not so sure but , seems like 5970 uses less power than 6990?
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August 25, 2011, 03:19:17 PM
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seems like 5970 uses less power than 6990?

I think in the 'standard' overdrive switch position power draw from a 6990 is about 350W, 450W+ when it's turned on.

But your question was about 5970s, which should come in less than 350W each allowing room for a little overclocking.

Assuming that, with 4 cards you're going to be pulling potentially up to 1400W.  That's quite a bit on a single rig - and quite a bit for normal 15A household circuits in the US - which can handle about 1800W, and your wiring will be a bit warm at that load.

Do you have a model number for that PSU?  Looking at ratings for the rails will help us give you a real answer.

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August 25, 2011, 03:38:45 PM
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than i guess 3 x 5970 + maybe 1 x 5870 is safer lol
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August 25, 2011, 09:47:57 PM
 #6

5970s at stock V are < 300W.
at 850/300 and stock V they're also < 300W.
930/1000 at 1150mV ~400W each
So that PSU should be fine as long as you don't overvolt em.

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August 25, 2011, 09:54:23 PM
 #7

5970s at stock V are < 300W.
at 850/300 and stock V they're also < 300W.
930/1000 at 1150mV ~400W each
So that PSU should be fine as long as you don't overvolt em.

What kind of MH/s can we expect from 850/300.  Howabout 930/300?

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August 25, 2011, 10:28:09 PM
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What kind of MH/s can we expect from 850/300.  Howabout 930/300?
Well after looking at the forum it seems like over 800 Mh/s is possible at 850 but @930 it might be closer to ~840.Having said that it could be much higher with the new Phat K 2.2 and GUI miner.Nothing

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August 25, 2011, 10:33:31 PM
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Well after looking at the forum it seems like over 800 Mh/s is possible at 850 but @930 it might be closer to ~840.Having said that it could be much higher with the new Phat K 2.2 and GUI miner.Nothing

Yeah I was hoping someone could chime in who has more updated miner versions with modded Phatk.  The values listed in the HW comparison table in the wiki are pretty old.

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August 27, 2011, 08:24:31 PM
 #10

930/1000 at 1150mV ~400W each
Is that safely sustainable?
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