How many watts do i need for my power supply?

PCPartPicker part list / Price breakdown by merchant / Benchmarks

CPU: Intel Core i5-4670K 3.4GHz Quad-Core Processor ($224.98 @ OutletPC)
CPU Cooler: Noctua NH-L9i 57.5 CFM CPU Cooler ($43.14 @ Mwave)
Motherboard: Gigabyte GA-Z87N-WIFI Mini ITX LGA1150 Motherboard ($129.99 @ Amazon)
Memory: G.Skill Sniper Series 8GB (2 x 4GB) DDR3-1866 Memory ($73.98 @ NCIX US)
Storage: Samsung 840 EVO 120GB 2.5" Solid State Disk ($98.99 @ Mac Mall)
Storage: Seagate Barracuda 1TB 3.5" 7200RPM Internal Hard Drive ($59.98 @ OutletPC)
Video Card: EVGA GeForce GTX 770 2GB Video Card ($329.99 @ NCIX US)
Case: BitFenix Prodigy (White) Mini ITX Tower Case ($79.98 @ OutletPC)
Case Fan: Corsair Air Series AF120 Performance Edition (2-Pack) 63.5 CFM 120mm Fans ($27.98 @ OutletPC)
Case Fan: NZXT FS-200RB-BLED 89.5 CFM 200mm Fan ($15.75 @ Amazon)
Power Supply: Antec High Current Gamer 620W 80+ Bronze Certified Semi-Modular ATX Power Supply ($64.99 @ NCIX US)
Operating System: Microsoft Windows 8 Professional (OEM) (64-bit)
Other: BitFenix Recon Fan Controller
Total: $1149.75
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2013-12-10 22:47 EST-0500)

Optimized build including the PSU.
 
Solution