You have to be gentle with the 975. Unlike the brute 965 that will take anything you throw at it, the 975 doesn't like high voltages, so you need to find the sweetspot where she'll purr for you all day long. Start out at default settings with everything on auto and gradually increase the clocks, you'll be amazed at how fast you'll get on little vcore. Then go manual and fine tune her
After getting used to the Classy bios, the ASUS bios really sucks cause it wants to do everything for you behind the scenes. Would rather do it myself