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1000Watt enough for 4 GPU? [3-280x+7950]
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Topic: 1000Watt enough for 4 GPU? [3-280x+7950] (Read 460 times)
Liquitrix
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1000Watt enough for 4 GPU? [3-280x+7950]
April 12, 2014, 02:55:02 PM
#1
Hey guys,
I am currently using 3 GPUs - all 280x - with a 1000 Watts PSU.
I recently purchased a 7950 Powercolor PCS+ .
Can I power all 4 cards with this PSU: BeQuiet! PowerZone 1000W 80+Bronze ?
I am mining Scrypt algos
all 280x are ASUS DirectCU II TOP
thanks
Equate
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Re: 1000Watt enough for 4 GPU? [3-280x+7950]
April 12, 2014, 02:57:54 PM
#2
1200W would be appropriate since you will have some headroom , also undervolt the cards.
sonysasankan
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Re: 1000Watt enough for 4 GPU? [3-280x+7950]
April 12, 2014, 03:37:11 PM
#3
Quote from: Equate on April 12, 2014, 02:57:54 PM
1200W would be appropriate since you will have some headroom , also undervolt the cards.
The asus can be undervolted and is quite effecient and you are probably peaking with 3 280X on a 1000W. Also its holding because its a single rail PSU. It will shut down if you connect another 280/7950 in it.
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envy2010
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Re: 1000Watt enough for 4 GPU? [3-280x+7950]
April 12, 2014, 03:44:22 PM
#4
If you undervolt and downclock the cards to their most efficient (in terms of MH/s per watt) point, then you can easily run them all on a good 1000W PSU. The better question then is whether you will get enough of a hashrate bump to justify it... I can't answer that.
I would not personally do this because 280x's and 7950's like very different scrypt settings, and you are hobbling your rig if you ever want to go full blast.
nostradamus
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Re: 1000Watt enough for 4 GPU? [3-280x+7950]
April 13, 2014, 12:11:50 PM
#5
Short answer: No.
Long Answer: Mayyybe, if you undervolt and/or are mining a less power hungry algo like X11.
Either way, you will probably want 1200W+. Even if you can run on a 1000W PSU, efficiency and lifespan will suffer from running at 100% capacity.
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