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sli 980s psu requirements?

Soldato
Joined
18 Feb 2004
Posts
3,095
Location
Lincolnshire
Yesterday i received my two Gigabyte gaming g1 980s and installed them.
I have a seasonic G series 750w psu and the specs in my sig. The issues im having is whether the psu has enough juice as when i run 3d mark earlier about half way through the bench i was presented with a black screen and the program had stopped responding according to task manager.

The psu itself doesnt really have enough outputs to fulfill all the needs of my connections, one for the mobo pcie power, two 8 pin for each gpu, then ssd, 2x hdd and a blu ray drive.

The seasonic only has two pcie outputs and i need three two for the cards and one for the motherboard, hope that makes sense.

So should 750w be enough normally and what would i ideally need to purchase to give me enough headroom for ocing the cards and keeping my existing cpu overclock?

thanks in advance.
 
connected with two on each card, but to fit everything in i have had to use a convertor from the standard ide power connectors to the bottom card and then use the pcie cable from the psu to the motherboards extra power input being a z87x-oc the manual states if running sli then the onboard power must be connected.
This is where the problems stems from, not enough outputs on the psu.
 
If it's a single rail PSU you should be fine, my peak draw is around 520W. Never seen it above that.

980 SLI @1400/8000 + 4790k @4.4, 32 gb ram
 
I bought a superflower 850W to make sure that I can SLI my 980 in the future. But it only came with 2 8-pin gpu conncetors - does anyone know if you can buy extras?

Surely you must be able to buy extra cables?
 
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