How big does my PSU need to be?

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1

Hi im buying all parts for my new gaming PC and need to know how many watts I need for a PSU. It'd be great if you could help me out. thanks

specs

MSI GeForce GTX 670 Power Edition OC 2GB

1x Xigmatek XLF-F1455 140mm LED Fan

Seagate Barracuda 1TB ST1000DM003

ASRock Z77 Extreme4 Motherboard

G.Skill Ripjaws X F3-12800CL9D-8GBXL (2x4GB) DDR3

CoolerMaster HAF 912 Advanced

Intel Core i5 3570 (not overclocking)

Samsung SH-224BB/BEBS SATA DVDRW Drive OEM

And probally about 4 USB devices plugged in at once.

 

2

Ideally i'd say a 600/650Watt PSU,

Just to give you some overhead, anything below that and your cutting it close incase you decide to future overclock your gear.

if you want enough headroom to add a 2nd Nvidia 670 in the future get a 850Watt psu.

Hope this helps :) 

3

Thanks man helps alot

4

500 is a good number. Your consumption is probably closer to the 380-430 range