How much power supply do I need for computer build?

Cpt Nooby

Honorable
Oct 18, 2013
22
0
10,520
Hey guys, I'm planning to build my first PC, and I'm unsure of how much power my PSU should have (I don't want to have too less or else I might fry my system):

Here is my current build:
Intel Core i5 4670 Quad Core LGA 1150 3.4GHz

ASUS H87-PRO Motherboard

Samsung 840 EVO Series 120GB 2.5" SATA3 Solid State Drive

Western Digital WD Green WD30EZRX 3.5" 3TB SATA 6.0Gb/s Hard Drive

EVGA GeForce GTX 770 Superclocked with ACX Cooler 4 GB GDDR5

Kingston ValueRam KVR16N11/8 8GB DDR3 1600MHz Memory

Thermaltake Commander MS-II Mid Tower Case (might have 1 or 2 extra 120mm fans)