Currently I do not have the molex PCI-E power connector hooked up. I've been running GTX690 overclocked without issues. (before upgraded to the 690, I had two heavily OC'ed 480s but no issues as well) I have seen someone having issues with 670 SLI on a Asrock X79 board because of the molex connector not being used. Do I need to connect it just to be safe?
ASUS RIVE, 3960X (@4.3GHz), Corsair CML16GX3M4A1866C9 4x4GB (@1866MHz 9-10-9-27), EVGA GTX Titan Black Hydro Copper Signature SLI, Plextor M5 Pro 512GB SSD, Corsair AX1200 PSU, Creative Sound Blaster X-Fi Titanium Fatal1ty Pro