The OCZ Modstream is impressive, it's silent, and it performs great.. I tell you, it's a lot more stable than other powersupplies I reviewed, ones that were suppose to be silent.... and it's fairly cheap too (82euros for the 450watts version, and 111 for the 520watts version)! The only small problem I had with this powersupply was a high pitched noise coming from the inside. Now it wasn't really that annoying, but still worth mentioning. Put it in your case and the sound is nearly gone!