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Crossfire 7950's and Ultra 750w PSU

post #1 of 6
Thread Starter 
I just ordered 2 x Gigabyte 7950's and a 750w psu from ultra

Im curious what all i need to power them and if my psu would power it. I have 2 x 6850s right now and i only need a 4 pin power connector, the video cards i saw in the pictures it has 2 x 6 pin connectors.... im ******* confused.....any help would be appreciated , i next day'd them and im hoping to get a reply soon! Thanks!
post #2 of 6
What PSU do you have?
post #3 of 6
Quote:
Originally Posted by Davayy View Post

What PSU do you have?

99.9% sure it's this: http://www.tigerdirect.com/applications/SearchTools/item-details.asp?EdpNo=3276567

I would not Crossfire 7950's with that PSU. It's junk.
post #4 of 6
Thread Starter 
no actually its http://www.tigerdirect.com/applications/SearchTools/item-details.asp?EdpNo=1583410&csid=_61

otherwise i don't think i would be able to crossfire 2 x 6850s
post #5 of 6
Quote:
Originally Posted by sctducky View Post

no actually its http://www.tigerdirect.com/applications/SearchTools/item-details.asp?EdpNo=1583410&csid=_61
otherwise i don't think i would be able to crossfire 2 x 6850s

the PSU you bought has two 6 pin and two 8 pin (6+2) PCI-E power connectors. the 8 pin connector can support 6 pin . so you have 4 6 pin PCI-E power connectors. the PSU has 56A on +12v rail. 56 x 12 = 672w. Thats enough for HD 7950 Crossfire system.
Edited by raghu78 - 11/1/12 at 5:43am
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CPUMotherboardGraphicsGraphics
Intel Core i5 2400 DH67BL AMD Radeon HD 6900 Series XFX HD 6950 2GB 
RAMRAMHard DriveOptical Drive
Corsair Corsair DDR3 1333 Mhz 2 GB Corsair DDR3 1333 Mhz 2 GB Western Digital Caviar Green SONY DVD-RW AD-7260S 
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Windows 7 Professional 32 bit BENQ G2420HD Logitech K200 Seasonic VX550 psu 
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ANTEC 200 V2 Logitech mouse 
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Fragbox
(14 items)
 
  
CPUMotherboardGraphicsGraphics
Intel Core i5 2400 DH67BL AMD Radeon HD 6900 Series XFX HD 6950 2GB 
RAMRAMHard DriveOptical Drive
Corsair Corsair DDR3 1333 Mhz 2 GB Corsair DDR3 1333 Mhz 2 GB Western Digital Caviar Green SONY DVD-RW AD-7260S 
OSMonitorKeyboardPower
Windows 7 Professional 32 bit BENQ G2420HD Logitech K200 Seasonic VX550 psu 
CaseMouse
ANTEC 200 V2 Logitech mouse 
  hide details  
Reply
post #6 of 6
Thread Starter 
Ok ill have to get that formula to remember that. Thanks for the help the video cards are out for delivery!!!! biggrin.gif
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