With todays more demanding videocards and computers, the need for a good and stable power supply is high. Many manufacturers claim theirs are the best and that you need a 700W PSU to be able to get a stable computer. Well in many cases this is not true, Silverstone sent us a sample of their latest creation a SST-ST40EF which is a 400W power supply. It comes with "only" two 12V rails when most manufacturers create ones with three or even four 12V rails. Can this one work aswell as the others? Will it be able to keep a computer stable with only 400W and two 12 rails? Well this is what we are here to figure out today.

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