simple
3 on 1050w
4 on 1200w
better to be safe than sorry and your PSUs will last longer if you dont max them out
Topic: How many 7950s can I run on this power supply? - page 2. (Read 4256 times)
7950s draw 200w, absolute maximum. If we're talking real power (Gold rated PSUs), then 1000w is more than enough for 3 cards. If you're using a budget or low power CPU (like Intel S and T processors) then you should be able to power 4 cards with a bit left over. I recommend the i5-3470T - at 35 watts you could easily run 4x 200w video cards.
Have to call you on that, the 7950 under bitmining (BTC) load is around 175w on a reference card, and 186-188w on a weak factory OC to 900mhz (see charts here for evidence: http://www.tomshardware.com/reviews/radeon-hd-7950-review-benchmark,3207-9.html ). With significant overclocking, they can easily get close to the 7970's 250w TDP.
While it is quite possible to stay under 200w, if you are going for the most hash's, it is far from being an absolute maximum.
Also, I have heard in multiple places that LTC has a slightly higher power usage, but that could be hearsay, I have not borrowed my friends kill-a-watt to test my computer under BTC vs LTC mining. I will be borrowing it soon though (or relatively soon, as I live in rural Alaska, and he is almost 100 miles away) to test it.
Edit: 1000 quality watts should be fine for 3 cards easy, I wasn't trying to contest that evaluation. Just trying to point out that it can be a significant load.
7950s draw 200w, absolute maximum. If we're talking real power (Gold rated PSUs), then 1000w is more than enough for 3 cards. If you're using a budget or low power CPU (like Intel S and T processors) then you should be able to power 4 cards with a bit left over. I recommend the i5-3470T - at 35 watts you could easily run 4x 200w video cards.
So 3 7950s on 1050w, what about 4 on a 1200w (gold rated)?
Or would that be pushing it...
Or would that be pushing it...
3 cards. You may be able to get away with 4 cards if you under volt - get a electricity energy meter plug and check how much 3 cards consume when you under volt and make sure to take measurements when your box is at full load.
Railgun.
So 3 7950s on 1050w, what about 4 on a 1200w (gold rated)?
Or would that be pushing it...
Or would that be pushing it...
i have free electricity and was hoping a bunch of people would sell their mining rigs but I guess interest in minning is higher than ever...
I wouldn't try to go beyond 3 cards with 1050w, wouldn't be stable.
4 cards would mean pushing the PSU to a level of load which would only result in failure.
Also, PSU's tend to get less efficient as they age.
3 cards it is!
4 cards would mean pushing the PSU to a level of load which would only result in failure.
Also, PSU's tend to get less efficient as they age.
3 cards it is!
It is a gold rated PRO1050w XFX Black Edition http://www.amazon.com/gp/product/B0066AH46G/ref=oh_details_o04_s00_i00?ie=UTF8&psc=1
Sapphire Radeon HD http://www.newegg.com/Product/Product.aspx?Item=N82E16814202030
Other than that, just a hard drive and case fans.
Sapphire Radeon HD http://www.newegg.com/Product/Product.aspx?Item=N82E16814202030
Other than that, just a hard drive and case fans.
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