PSU Recommendation For my Rig

[Sonu Dutta]

My Rig is:
Core i7 3930k
Asus Rampage IV extreme Motherboard
8gb(4x2) corsair Vengeance RAMs
Cooler Master Hyper 212 evo cpu cooler
Seagate Barracuda 1 tb + WD 500gb Hard disk(no ssd)
ATI R9 280X VAPORX 3GB OC graphic card
USP 100 black mid tower cabinet
I want to know whether a 850watt PSU is enough for my rig to run safely or not??if not then please recommend

 

[HEXiT]

more than enough for a single card setup. you could run another 280x off it and still have room to spare.