Need advice on psu

[PILLAGER]

I need some help deciding which psu to buy from this list:
http://www.eclipsecomputers.com/productlist.aspx?type=2&id=9
I know you'll probably say the silverstone is best but i read on some forums that for a hd4850 ill need a 600-700w psu to power it, and there's 600/700w ezcool on the list which (i think) has more amps on the rails than the silverstone, and it says its quiet also 80+.
i can only spend £50 so this list is perfect, i would go for the 700w ezcool but i have a feeling i dont know enough about it to be sure.

 

[Henry Chinaski]

For running an ATI 4850 all you need is a quality PSU which can provide 450W and presents one 6-pin PCIe connector. Your graphic card will need 150W at maximum.

From your choices I would go for the OCZ StealthXStream 2 (OCZ500SXS2) 500W (by FSP), but unfortunately there is not any qualified review yet.

If you can increase a bit your budget I recommend you to go for this one:

Antec EarthWatts 650W ...49,25

This PSU has been made by Delta Electronics which is one of the best PSU manufacturers nowadays. It has one PCIe 6-pin and another PCIe (6+2)-pin connectors (so you will be able to run two 5770 in CF without using any molex-to-PCIe adapters) which are joined to take 12V3 all to themselves (25A). There are three independently regulated +12V rails in total (2x22A + 1x25A). Its voltage regulation is very good. The ripple and noise suppression is good enough.
It presents a good efficiency (80 plus certified) and performs quietly (the fan is an ADDA AD1212HB-A71GL, which is a good one)
Considering the affordable price, the Antec EarthWatts 650 is a great choice.

Here you will find some information and reviews about this PSU and another ones: http://personales.ya.com/realhardtechx/index_archivos/Page541.htm

 

[Emperus]

Pretty much every PSU in that list will easily power a single HD 4850..

 

[davcon]

+1 for the SILVERSTONE

 

[saaiello]

The Silverstone ST 50 is a fantastic Power Supply it would be the one I would choose off that list followed closely behind by the Corsair.

 

[shovenose]

+1 silversone