Which of these two PSU is the best

[OwenNRX70]

My friend said he'd let me buy two of his old power supplies for £20. They both unused so should be fine
I have an i5 3470 and a GTX660 which would be the best
Zalman ZM500 GS
http://www.scan.co.uk/products/500w-zalman-zm500-gs-uncertified-quiet-fan-atx-v23-psu
XFX core 450w
http://www.scan.co.uk/products/450w-xfx-pro-core-edition-p1-450s-x2b9-85-eff-80-plus-bronze-sli-crossfire-eps-12v-fan-atx-v231-psu
Thanks in advance...
Xavier

 

[Avenged7x]

I don't know anything about the Zalman.

However the XFX is certainly a quality unit, they are Seasonic made.

 

[Rammy]

100% the XFX. While the Zalman claims to have a higher wattage, in reality they have pretty similar potential.
XFX has 80Plus Bronze cert and (depending on your friend) a 5year warranty.

 

[DarkSable]

Go with the XFX.

I'm not certain HOW old they are, so I'm not positive if the companies were still as reliable, but currently XFX produces good PSUs, while Zalman is middle-of-the-road.

 

[OwenNRX70]

OK thanks the power supplies are like a month old so the warranty on the XFX will be intact
I think i'll go for the XFX