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Powerful PSU 4 BTC

X

XacTactX

Supreme [H]ardness
Joined
Dec 13, 2010
Messages
4,137
Hey everyone. I'm about to build a rig and this rig will be solely dedicated to bitcoin. I currently have two 6950s for this purpose but I plan on buying more GPUs as I find suitable 5800 and 6900 models.

Assuming 170-200w each for the cards how big a PSU would I need to support a maximum of five cards? This would be done with a relatively average CPU I'm not sure if I will get something older like an Athlon or Celeron or something new like i3 2100. I'll need further guidance in this regard but it'll be dual core unless more is needed.

One of the important things I'm wondering right now is: usually, an 80Plus certified PSU is more expensive than one that isn't, and that increases as you approach 80Plus Platinum. Is it worthwhile to pay slightly more for the sake of higher efficiency? I doubt the cost difference would even out even after a long time, but what do you think?

If anyone knows about a fantastic deal on a 1000w+ PSU I'd appreciate a link.

Thank you.w
 
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XacTactX said:
One of the important things I'm wondering right now is: usually, an 80Plus certified PSU is more expensive than one that isn't, and that increases as you approach 80Plus Platinum. Is it worthwhile to pay slightly more for the sake of higher efficiency? I doubt the cost difference would even out even after a long time, but what do you think?
Click to expand...
Depends on how much power your system is taking up over a 24 hour period, how much electricity costs in your area, and the efficiency of the PSU itself. That's something that you're gonna have to calculate for yourself. As such, some people need a Platinum, others just a Gold, and some just a Silver or Bronze.

As for what PSU you should go for, I'd aim for a 1200W PSU to get closer to the ideal efficiency as well as to provide enough overhead. Something like the Antec High Currenty Pro 1200W.
 
Thanks for the recommendations guys, and after I did some mental math I realized that you're totally right, 1200 will be required to power five big, bad cards like the ones I might get. It's just that the 1200w range is so expensive, I'm going to see if I can trim back my expectations and score a 1000 for ~$150 or less. You guys think a 1000w would power four GPUs adequately? I'm fairly sure it would.

Thanks a bunch for the help.
 
Highly depends on the GPU's you're running. 4 6970's on a 1000 watt? Maybe, but barely. Depends on whether you're overclocking or not. 4 5870's? Most definitely yes.
 
I'm not sure if your interested, but I have a brand new corsair 850w v2 PSU that is less than 2 weeks old. You can have it for $115 shipped, and I'll include the newegg receipt in the box.

This PSU can power an I7 930 at stock voltage and 3 6950 at stock frequency's with no issues. I have a dedicated bitcoin rig running a an I7 950 stock frequency's and 3 6950's flashed to 6970's along with a 5770 and that rig pulls in 880-920 watts on my older V1 corsair 850w PSU at the outlet measured with a kill-a-watt detector. This translates to roughly 775watts is what the PSU is actually outputting so your fine.

This PSU outputs 849 watts when the actual input is roughly 1022 watts according to johnnyguru

http://www.newegg.com/Product/Produ...cm_re=corsair_850w_psu-_-17-139-022-_-Product


http://www.jonnyguru.com/modules.php?name=NDReviews&op=Story2&reid=218
 
JJ91284 said:
I'm not sure if your interested, but I have a brand new corsair 850w v2 PSU that is less than 2 weeks old. You can have it for $115 shipped, and I'll include the newegg receipt in the box.

This PSU can power an I7 930 at stock voltage and 3 6950 at stock frequency's with no issues. I have a dedicated bitcoin rig running a an I7 950 stock frequency's and 3 6950's flashed to 6970's along with a 5770 and that rig pulls in 880-920 watts on my older V1 corsair 850w PSU at the outlet measured with a kill-a-watt detector. This translates to roughly 775watts is what the PSU is actually outputting so your fine.

This PSU outputs 849 watts when the actual input is roughly 1022 watts according to johnnyguru

http://www.newegg.com/Product/Produ...cm_re=corsair_850w_psu-_-17-139-022-_-Product


http://www.jonnyguru.com/modules.php?name=NDReviews&op=Story2&reid=218
Click to expand...

Edit: woops, read that wrong, ignore me.
 
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