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post #41 of 58
Your gonna need a second powersuply to power the 4 cards. a single 1200W is not gonna be able to handle all that. So you are gonna need a bigger case just to fit that in there.

You can also look into dedicated GPU power supplys, that normly fit into the expansion bays.
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post #42 of 58
Why not build two machines, 4 gpus each, and cluster them in a linux cluster. You'll lose some computing power to overhead, but it will be much more feasible and scalable. Get some more money, add a third box.

Plus, you can put them on different circuits. Remember, a 15 amp circuit will trip with a sustained load of 1320 watts. It can handle higher spikes, but it sounds like you'll be maxing these things out.
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post #43 of 58
Quote:
Originally Posted by ocpokey View Post
Does this limit apply per socket, per outlet or for the entire household?
That would be per 20 amp breaker. Sockets are usually ran in series off of the breaker. Now in some industrial settings they can use 25-30 amp breakers. Or in some household setting they can use only 15 amp breakers. Also outlets can be lower power than a breaker because many are ran in series. Also remember power strips are also usually only rated for 15 amps.

Best bet, put a meter on your outlets.

ps most houses I have come across have a 200 amp main. But remember there is an AC, refrigerator, washing machine, dryer all being power hungry. However if you need a 220/240 outlet for a limited time you can usually steal from your dryer.
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post #44 of 58
Thread Starter 
Hey guys, so yeah... I've decided to go with 2 x 5970s per rig after all. It turns out that I can build a minimal box for less than $200/card that way (i.e., less than $400 total allows me to run 2 cards).

How much PSU do I need for 2 x 5970s and minimal other hardware? (Sempron 140 CPU, 1 GB DDR3 RAM, etc...)
    
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post #45 of 58
Quote:
Originally Posted by Muhahahaha View Post
Hey guys, so yeah... I've decided to go with 2 x 5970s per rig after all. It turns out that I can build a minimal box for less than $200/card that way (i.e., less than $400 total allows me to run 2 cards).

How much PSU do I need for 2 x 5970s and minimal other hardware? (Sempron 140 CPU, 1 GB DDR3 RAM, etc...)
You should be able to use a good 850w and get away with it.
    
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post #46 of 58
Here. http://educations.newegg.com/tool/psucalc/index.html I follow this and add about 200w - 400w to that just to make sure that your PSU never works too hard but always has the power no matter what for what you want. And some future add on hardware.
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post #47 of 58
Thread Starter 
Quote:
Originally Posted by Hysteria~ View Post
You should be able to use a good 850w and get away with it.
How about something like this? http://www.newegg.com/Product/Produc...82E16817153106

It's got 69A on a single 12V rail.
    
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post #48 of 58
Quote:
Originally Posted by Muhahahaha View Post
How about something like this? http://www.newegg.com/Product/Produc...82E16817153106

It's got 69A on a single 12V rail.
That should work.

Let me know how all this turns out, I too am in the process of planning a farm of my own for some major computing power.
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post #49 of 58
Thread Starter 
Quote:
Originally Posted by Crystal_Castles View Post
That should work.

Let me know how all this turns out, I too am in the process of planning a farm of my own for some major computing power.
Actually, I heard some bad things about that particular PSU. Now I'm thinking of this one instead: http://www.newegg.com/Product/Produc...82E16817207011

Sure, I'll let you know how it goes.
    
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post #50 of 58
That one is better than the Tt.

Anything other than the Toughpower series is pretty much garanteed crap.
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