Will a Coolermaster Silent Pro Gold 1000w work for 2?

It's what I currently have to use but its 2 x 6 pin pci-e per cable, they aren't individual cables so I am bit worried abut the cable temp, will it still be safe if I leave them at stock settings when doing it this way? (it would be 8 plugs to 2 units on 4 cables)

http://www.coolermaster.com/powersupply/silent-pro-gold/silent-pro-gold-1000w/