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I need PSU/s ideas 6 x 7970 Vapor-X for overclocking / sucking ~400W (+/- 50W?) each - Page 3

post #21 of 57
Quote:
Originally Posted by Broseidon View Post

No 7970 draws 400 watts by itself. That's absolutely ludicrous. You might draw 400 watts for an ENTIRE system with one 7970. Not the card itself.

This

The measured wattage requirements in the reviews measure the ENTIRE system draw
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post #22 of 57
on a side note, if last resort needed, i believe thermaltake and visiontek have side 450w 5.25 psu's dedicated usually for gpus.
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post #23 of 57
Quote:
Originally Posted by Broseidon View Post

No 7970 draws 400 watts by itself. That's absolutely ludicrous. You might draw 400 watts for an ENTIRE system with one 7970. Not the card itself.

Not normally. As tsm106 pointed out it would pretty much take hardmodding or non-reference PCBs to pull it off.
Overclocked cards can pull far more power than the specs show, but most won't be able to do it out of the box.
Quote:
Originally Posted by Dudewitbow View Post

on a side note, if last resort needed, i believe thermaltake and visiontek have side 450w 5.25 psu's dedicated usually for gpus.

^^ This is an idea as well, like these http://www.newegg.com/Product/Product.aspx?Item=N82E16817104054&nm_mc=OTC-pr1c3grabb3r&cm_mmc=OTC-pr1c3grabb3r-_-Power+Supplies-_-FSP+Group+%28Fortron+Source%29-_-17104054
    
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post #24 of 57
Yeah those cards won't take as much juice as you think. I can do some folding like operations with three GPU's with system wide wattage at around 550watts that's including my 3930K thats overclocked. This is with only 950mv and 950 core though. But with 1200mv 1200core I can pull out about 1050 watts with three GPU's with 24/7 folding like operations. I run them underclocked though my undervolted yeild is about 85% of the OC yield settings and I use about 45% less wattage.
But yeah my point is you will have a hard time getting that many watts out of your cards. Dual PSU will be enough.
Edited by UNOE - 4/11/13 at 1:08am
 
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post #25 of 57
You should consider a 1600 LEPA as a bare minimum. If you want some head room for overclocking any components, get two AX1200is.
     
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post #26 of 57
Thread Starter 
Quote:
Originally Posted by Hatfieco View Post

Well 1366 socket only had 32 native pci e lanes where are you getting the other 32 lanes from? Using an nf200 or lucid chipset? The variation in voltage accross the 12v rail will have no impact on your system between the two psu, one psu exclusively powering 3 7970s and the mobo/cpu and the other running the rest of the gpus and periphs means that there is no circuit dependent on the voltage of another. Shouldn't be an issue at all.

There's a BIOS update for the WS Supercomputer which then gets 7xPCI-E
post #27 of 57
Thread Starter 
Quote:
Originally Posted by Broseidon View Post

No 7970 draws 400 watts by itself. That's absolutely ludicrous. You might draw 400 watts for an ENTIRE system with one 7970. Not the card itself.
Even with disabled OCP?
post #28 of 57
Thread Starter 
Quote:
Originally Posted by Dudewitbow View Post

on a side note, if last resort needed, i believe thermaltake and visiontek have side 450w 5.25 psu's dedicated usually for gpus.
Awesome!! Thanks! This will do the job. 6 x http://www.tigerdirect.com/applications/SearchTools/item-details.asp?EdpNo=5681047 for each graphic card eventually, unless something else comes out as an idea!
post #29 of 57
What's your purpose of the build? Workstation/rendering? Have you compared what 4k in titan would give you vs 4k in 7970's? Titans would definitely be cheaper to operate.

link to another thread....
http://www.overclock.net/t/1140534/psu-calc-final-release
Edited by PwndN00b - 4/11/13 at 6:40am
     
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post #30 of 57
You won't be pulling 450w per card.
If mine were pulling 900w + the 200w or so for other crap in my system then my PSU would commit suicide.
You'll probably pull something like 300w per card maximum.
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