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How many watts do i need for crossfire (POWERCOLOR Radeon HD 6950 2 CFGB GDDR5

Last response: in Components
June 3, 2012 3:50:52 PM

so I'm getting a new rig pretty soon and just wanted to now if a 1000w power supply could support all this

CPU: i5 3570k 3.4

GPU: powercolor radeon hd 69502 gb DDR5 in crossfire

Mobo: biostar tz77b

PSU: XTREMEGEAR 1000W power supply
a c 139 ) Power supply
June 3, 2012 4:00:03 PM

Hello XxalexguyxX;

1000W is about right for 3, maybe 4 HD 6950s.

Have you seen any good reviews of that particular PSU?
June 3, 2012 4:37:35 PM

pretty sure you could slide by with 700w easy with 2x650. probably even less
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a b ) Power supply
June 3, 2012 4:58:24 PM

Hi :) 


All the best Brett :) 
June 3, 2012 5:10:17 PM


People have been able to run XFire 6950's on 650W PSU's however I would recommend at least 750W just to give you some headroom.

That PSU seems like junk, although it is 1000W it most likely won't output that much and if it does it will not be for a very long time. Stick to known brands that can actually output there advertised wattage such as Corsair, Antec, XFX, Seasonic, Delta and some others.

Also I realised that your motherboard only operates at 4x when 2 pci slots are active. I would suggest you find another board that operates at 8x each minimum to ensure better performance.
a c 111 ) Power supply
June 3, 2012 5:32:03 PM


Get rid of it.

Swap for a corsair, antec, seasonic, xfx, etc. psu.