XtremeComputing put up a Silverstone ST40EF (efficient) 400watt PSU Review
I think I can safely say that the SilverStone ST40EF passed that particular test with flying colours. No power rail deviated any amount really worth mentioning considering what the pc was doing. I don't know what the actual specs are for regulation on power rails but, personally, I think the 12v rail deviating only 0.18v from rated value, albeit 1.5%, whilst running a major graphics test and 2 instances of a torture test and copying a cd full of data really isn't worth worrying about in my opinionSilverstone ST40EF (efficient) 400watt PSU Review
