Originally Posted by XiDuel
Thanks for the fast reply
I don't really understand how it can be fake; I bought it right from scan a few months ago (http://www.scan.co.uk/products/700w-ace-psuace700br-black-with-red-12cm-fan-atx-v23-psu
Is there any way I can test it's true power without blowing it up again.
If I were to get a new psu, what would be the cheapest safe option to go for? And again if buying off scan, how could I tell if its rating is real?
broken_projector already gave an excellent answer, but I'd like to add a few things.
1st. The fact that it costs 17 pounds and claims to be a 700W PSU should bring up a big red flag, because that's simply ridiculous.... even if by some incredible miracle that PSU could deliver 700W, the output quality and stability would be so poor that you wouldn't want it anywhere near your HW, it's a hazard.
2nd. Yes, there are ways to test various relevant parameters (voltage regulation, ripple/noise suppression, transient response, etc), but it requires expensive equipment and proper know how (to do it correctly and precisely).
I would advice you get a DMM (digital multimeter) and check out some "how to" videos, then start playing with it and checking out stuff (voltage drops on particular rails, particular connectors, etc).
3rd. Not many good deals on scan at the lower end of the price spectrum, I wouldn't recommend anything else apart from the XFX Core 450, I'd suggest you look at other retailers (Ebuyer, OCuK, etc).