I have just picked up a 2nd 6950 cheap off ebay and am a bit worried about my psu its a fsp raider 650w unit with 668watt total power delivery.Now i know its fine for one 6950 but i am going to put in a 2nd and have checked on the extreme power supply website with my set up it say's toal req's is 550 with my system specs.So in theory i should be ok but i dont know about real world situations.So any input would be greatly appreciated.
i5 3470 @ 3.4 turbo to 3.6
8gb ddr 1600 ram
2x 320gb hdd
2x120mm bitfenix led fans
2x120mm non led fan's
pci wifi card
thanks heazps ghy's (and or girl's)
ps, i dont know if this relevant but i also have a samsung s27a950d 3d moniotr that i run @ 120hz
However, the real problem is that each 6950 needs 2 PCIe power pins and a 650w PSU is unlikely to have 4 PCIe pins. You could always use some Molex-to-PCIe pins if you're short, but bear in mind that you need 2 molex for each PCIe pin. So if your current power supply has only 2 PCIe power pins, you'll need to utilize 4 molex cables to be able to power the second card. And considering the number of fans and peripherals you have, I don't think thatllbe possible. Frankly, just due to the shortage of wires, you'll want a 750W unit that has 4 PCIe power cables.
Ok well i have all my fans running off my mobo fan headers and also i have 8 molex plugs that are not being used and also i have molex to vga adapters that use one molex with a yellow wire that loops through one of the back of the 6 pin vga connectors into the back of the one bellow it i know that you never used to be able to get adapters that use one and i have only ever seen this once.http://compare.ebay.com.au/like/321045695265?ltyp=AllFi...
but even if i have to use it and then a standard twin molex adapter its no probi was just worried that if oc the cards in xfire it might shut down on me.