First build PSU help

[c4balog]

It's my first time building a PC, and I'm having some trouble deciding how powerful the PSU should be and could use some help.

These are the components I've picked:

Mobo: Asus M4A79XTD EVO http://www.newegg.ca/Product/Product.aspx?Item=N82E16813131402
CPU: AMD Phenom II x4 3.2GHz BE http://www.newegg.ca/Product/Product.aspx?Item=N82E16819103808
GPU: HIS Radeon HD5770 1GB http://www.newegg.com/Product/Produ..._-Hightech+Information+System+Ltd.-_-14161317 (this one on Newegg aint exactly the same as the one I've chosen, but the specs are more or less identical)
RAM: Kingston DDR3 HyperX 4GB 1600MHz http://www.newegg.ca/Product/Product.aspx?Item=N82E16820104141
HDD: Western Digital Caviar GreenPower 1TB http://www.newegg.ca/Product/Product.aspx?Item=N82E16822136490
Case: Cooler Master HAF 922 http://www.newegg.ca/Product/Product.aspx?Item=N82E16811119197

I've been eyeing this 700W PSU from OCZ: http://www.newegg.ca/Product/Product.aspx?Item=N82E16817341019 , but I'd like some input before I decide.
Thanks in advance!

 

[bsoon_tan]

Use this site to calculate your needs. http://www.antec.outervision.com/

 

[JohnnyLucky]

Here are the official ATI recommended power supply requirements for the ATI Radeon HD 5770 and 5750 video cards:


450 watt or greater power supply with one 75 watt, 6-pin PCI Express® power connector recommended.

600 watt or greater power supply with two 75 watt, 6-pin PCI Express® connectors for ATI CrossFireX™ technology in dual mode.

The recommendations are for an entire pc system.


Corsair and Seasonic are two brands that have a reputation for high quality power supplies that consistently earn high marks in technical reviews. They are reliable, stable, and come with a 5 year warranty. Some of the newer models come with a 7 year warranty. In addition, some of the newer models have earned a gold certification for energy efficiency.