We test 9 550W to 650W PSUs ranging from £30 to over £90 - which will reign supreme?

We put ten 600W+ PSUs to the the test to see which is most worthy of your cash.

We put nine mid-range PSUs to the the test to see which is most worthy of your cash.

We grab a dozen of the latest 600-700W PSU products, strap them to the test machine and put them through their paces. With all your favourite brands tested, who is worth buying for your next upgrade?

Ultra X3s are shiny, totally modular and ooze coolness factor. We take a look at the mainstream 600W and enthusiast 1,000W models to see if the insides are as good as the outsides.

So you want a PSU that can run a high end system, but your case overheats, is too small or you want something really, really quiet? We may have finally found what you're looking for.