I am getting a new computer soon but can;t decide on the psu between corsair axa750 or ax650 specs: CPU: i5-3570k CPU Cooler: CoolerMaster Hyper212 EVO CPUCooler MB: GIGABYTE GA-Z77X-UD5H RAM: CORSAIR Vengeance CMZ8GX3M2A1600C9B GPU: EVGA GeForce GTX 680 Signature SC SDC: HT Omega eClaro HDD: WD5002AALX 500GB OD: ASUS DVD SATA RW PSU: Corsair Professional Gold AX650 Case: CoolerMaster HAF XM Monitor: ASUS VH238H Black 23"
Note: I (might, very likely) get a secondary 680 to run SLI with. I did say might. And I will do my first overclock on the CPU to 4ghz. So, 650 watts enough?