Minimum PSU Size for i5-4590, 8GB RAM, ASUS GTX 970

Hinzy

Honorable
Jan 14, 2013
10
0
10,510
As said in the title, what is the minimum PSU size for these specs:

CPU: Intel Core i5-4590 3.3GHz Quad-Core Processor ($265.00 @ Centre Com)
Motherboard: Asus H97-PRO GAMER ATX LGA1150 Motherboard ($149.00 @ Centre Com)
Memory: Corsair Vengeance Pro 8GB (2 x 4GB) DDR3-1600 Memory ($95.00 @ Centre Com)
Storage: Kingston HyperX Fury 120GB 2.5" Solid State Drive ($78.00 @ Centre Com)
Storage: Western Digital Caviar Blue 1TB 3.5" 7200RPM Internal Hard Drive ($69.00 @ Centre Com)
Video Card: Asus GeForce GTX 970 4GB STRIX Video Card ($499.00 @ Centre Com)
Case: Corsair 300R ATX Mid Tower Case ($109.00 @ PCCaseGear)
Power Supply: EVGA SuperNOVA NEX 650W 80+ Gold Certified Fully-Modular ATX Power Supply ($139.00 @ Centre Com)
Other: Asus (DRW-24D3ST OEM) Sata 24x DVD-RW - Black ($22.00)

Should I stay with the 650W or take it down to the 550W? Thanks in advance.