Hi all, I am upgrading my rig to the following: ASrock Z68 Extreme7 gen3 mobo Core i7-2600k CPU Noctua NH-D14 2x4GB of DDR3-1333 ram 2x 7970 in CF (XFX DD BE + MSI Lightning) I have two hard drives, no optical drive, 6 case fans, and about 10 USB devices attached. My power supply is an HX750 at the moment, which I have been very happy with. However, would you trust it to deliver enough power to this rig once overclocked? I know that it is plenty to handle everything at stock, but I plan to run the 7970s at 1200 MHz core and the 2600k at as close to 5 GHz as I can get it. My XFX 7970 requires 1.225V on the core to run at 1200 MHz, the lightning hasn't been installed yet but I assume that it will be similar. Do I need to upgrade my PSU? I'm thinking that it might be able to handle everything but am just not sure. Really don't want to upgrade if I don't have to. If you think I do need an upgrade, what do you think of the Corsair AX-1200 as an option? Thanks!