New system and new gfx card, what PSU do I need?

[DNAWEU]

I recently purchased a hardware bundle from OCUK. Specs of the bundle are:

- CPU: AMD Athlon II X4 Quad Core 640 3.00GHz
- Motherboard: Asus M5A78L-M LX 760G (Socket AM3) DDR3 Motherboard
- RAM: 4GB (2x2GB) DDR3 1600MHz Dual Channel
- Cooler: AMD Stock Cooler

I'm going to buy an ATI Radeon 6770 tomorrow and need a PSU which will run the gfx card and the system pretty well. I'm only looking to spend around £40-£70 on a PSU so on quite a budget.

I'm considering this PSU, will it run the system OK?
http://www.overclockers.co.uk/showproduct.php?prodid=CA-201-CM&groupid=701&catid=123&subcat=

Thanks.

 

[stulid]

http://www.overclockers.co.uk/showproduct.php?prodid=CA-055-OC&groupid=701&catid=123&subcat=1098

Thats my suggestion.

Even 550W is a huge amount for that spec.

 

[DNAWEU]

Thanks, I've ordered it. Looking forward to trying out the 6770 tomorrow!