[QUOTE=Kerry56;2226458]If you are interested in reducing noise from your computer, you should look at this site: http://www.silentpcreview.com/ They have a wealth of information on the subject.
[B]Power supplies shouldn’t be judged by wattage output alone. There are a lot of cheap psu’s with inflated ratings out there. [/B]Best to learn which companies are reliable, like Corsair, PC Power and Cooling, Seasonic, Fortron Source and most of the Antec and Enermax lines.
If you haven’t changed any other components, then adding more power probably won’t help or hurt anything. A newer psu from a company known for high quality may have less variation in the output than cheaper units. Having extra power might help if you plan on putting in a very high end video card, or lots of extra hard drives.[/QUOTE]
Here’s a perfect example of questionable wattage ratings.
Here’s a [B]430W[/B] Thermaltake:
What we see is the that the important 12V output is a measly [B]18A[/B].
Now here’s a [B]300W[/B] HEC supply (HEC actually makes this Thermaltake):
Notice the similarity and again the [B]12V 18A output[/B]? A casual buyer looking to upgrade this correctly labeled 300W PS to a more powerful 400+W unit would be screwed if he bought the deceptively rated 430W Thermaltake.
Now here’s a 380W Antec:
Antec provides the info to figure out the 12V amps. 324W divided by12 = [B]27A[/B]. The 380W Antec provides 50% more amps at 12V than the [I]supposedly[/I] more powerful 430W Thermaltake.
That said the Earthwatts line are almost totally silent and energy efficient (I have 2).
This unit, now on sale is hard to beat and provides 30A @ 12V.