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6970 CF with 600w power supply - Page 2

post #11 of 15
You should be fine if it's a reputable unit.

Make sure you have 17amps x 2(or 34a) on the 12v rail as a 6970 requires 200w @ load.

You're cutting it close but there is nothing wrong with using a PSU at or near it's intended capacity.

People here like to cite "headroom" for the perceptual false sense of security.
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Po' Pimpin'
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post #12 of 15
Thread Starter 
Quote:
Originally Posted by compudaze View Post
HD 6950 CFX failed on my OCZ StealthXtreme 700W. I wouldn't try it.
Now that's something I'm surprised of. This power supply has been a great partner for me since 2007.

Anyways thanks for the tips guys.
My Computer
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i7 920 D0 4.2Ghz 1.35v EVGA X58 Classified 760 Sapphire HD 6970 Sapphire HD 6970 
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MSI HD 6970 12 Gb Patriot Sector 7 DDR3 Crucial M4 SAMSUNG Spinpoint F3 HD103SJ 1TB 7200 RPM 
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SAMSUNG Spinpoint F4 HD204UI  SAMSUNG Spinpoint F3 HD103UJ 1TB 7200 RPM Samsung DVD drive EK Supreme HF, EK waterblock HD6970, EX480 XSPC... 
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My Computer
(19 items)
 
  
CPUMotherboardGraphicsGraphics
i7 920 D0 4.2Ghz 1.35v EVGA X58 Classified 760 Sapphire HD 6970 Sapphire HD 6970 
GraphicsRAMHard DriveHard Drive
MSI HD 6970 12 Gb Patriot Sector 7 DDR3 Crucial M4 SAMSUNG Spinpoint F3 HD103SJ 1TB 7200 RPM 
Hard DriveHard DriveOptical DriveCooling
SAMSUNG Spinpoint F4 HD204UI  SAMSUNG Spinpoint F3 HD103UJ 1TB 7200 RPM Samsung DVD drive EK Supreme HF, EK waterblock HD6970, EX480 XSPC... 
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Windows 7 Professional x64 Dell U3011 G19 Corsiar AX850 
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Caselabs SMH10 G500 
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post #13 of 15
Quote:
Originally Posted by Pencuri View Post
Now that's something I'm surprised of. This power supply has been a great partner for me since 2007.

Anyways thanks for the tips guys.
I think 700W is plenty for 6950/6970 Crossfire, but I think the way the rails were divided up caused a problem and didn't provide enough power to one of the cards.
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post #14 of 15
If you drop your CPU and GPUs to stock, you might be able to run it. Set powertune to -20 percent



Just don't run Furmark.

If you want to be very safe, just run only 1 card.
post #15 of 15
Thread Starter 
Quote:
Originally Posted by compudaze View Post
I think 700W is plenty for 6950/6970 Crossfire, but I think the way the rails were divided up caused a problem and didn't provide enough power to one of the cards.
I thought of that as well. The reason why i rma-ed my ax850 is because of that I'm guessing that it had a faulty +12v rail. It gave me problems CFing my cards
My Computer
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CPUMotherboardGraphicsGraphics
i7 920 D0 4.2Ghz 1.35v EVGA X58 Classified 760 Sapphire HD 6970 Sapphire HD 6970 
GraphicsRAMHard DriveHard Drive
MSI HD 6970 12 Gb Patriot Sector 7 DDR3 Crucial M4 SAMSUNG Spinpoint F3 HD103SJ 1TB 7200 RPM 
Hard DriveHard DriveOptical DriveCooling
SAMSUNG Spinpoint F4 HD204UI  SAMSUNG Spinpoint F3 HD103UJ 1TB 7200 RPM Samsung DVD drive EK Supreme HF, EK waterblock HD6970, EX480 XSPC... 
OSMonitorKeyboardPower
Windows 7 Professional x64 Dell U3011 G19 Corsiar AX850 
CaseMouse
Caselabs SMH10 G500 
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My Computer
(19 items)
 
  
CPUMotherboardGraphicsGraphics
i7 920 D0 4.2Ghz 1.35v EVGA X58 Classified 760 Sapphire HD 6970 Sapphire HD 6970 
GraphicsRAMHard DriveHard Drive
MSI HD 6970 12 Gb Patriot Sector 7 DDR3 Crucial M4 SAMSUNG Spinpoint F3 HD103SJ 1TB 7200 RPM 
Hard DriveHard DriveOptical DriveCooling
SAMSUNG Spinpoint F4 HD204UI  SAMSUNG Spinpoint F3 HD103UJ 1TB 7200 RPM Samsung DVD drive EK Supreme HF, EK waterblock HD6970, EX480 XSPC... 
OSMonitorKeyboardPower
Windows 7 Professional x64 Dell U3011 G19 Corsiar AX850 
CaseMouse
Caselabs SMH10 G500 
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Reply
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