500 watt PSU for my build?

samuel2012

Honorable
Oct 20, 2013
38
0
10,530
So here is my finished parts list:

CPU: Intel Core i5-4670K 3.4GHz Quad-Core Processor (£174.89 @ Ebuyer)
Motherboard: Asus Z87-A ATX LGA1150 Motherboard (£105.44 @ Scan.co.uk)
Memory: Corsair Vengeance 8GB (2 x 4GB) DDR3-1600 Memory (£63.53 @ Amazon UK)
Storage: Hitachi Deskstar 7K1000.D 500GB 3.5" 7200RPM Internal Hard Drive (£51.93 @ Amazon UK)
Video Card: MSI Radeon HD 7950 3GB Video Card (£174.95 @ Scan.co.uk)
Power Supply: EVGA SuperNOVA NEX750B BRONZE 750W 80+ Bronze Certified Semi-Modular ATX Power Supply (£76.19 @ Dabs)
Optical Drive: HP 447326-B21 DVD/CD Drive (£23.80 @ Amazon UK)
Operating System: Microsoft Windows 7 Home Premium SP1 (OEM) (64-bit) (£65.99 @ Aria PC

SO there's my build, of which I already own half of.

On part picker, it says that the estimated wattage would be 445 watts.

Now my question is, if I don't overclock, would i be able to use a 600 watt Enermax noise taker that I've got from a previous build going to be enough? I'd really like it if I could save the £60 it would cost for the EVGA PSU and spend it on a new GPU or something!