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The easiest way to shop for power supplies is to pick up the box and look at the number of certifications that are listed on it.
Reality is that unless you have a schematic, are a power engineer, and have lots of time, you are not going to identify the good supplies from the bad using any criteria at all other than name brand reputation and reviews. You can, however, gain a good indication of what is and what isn't good by looking at the acceptance labels from the certification agencies.
Generally speaking, more certification acceptance translates into a better quality power supply.
You should see the backward-R of the Underwriters Labs, and also stickers from the German, the Japanese, the Norwegian, and all the other cert agencies. A supply that has 6 or 7 cert labels on it is probably a good supply, regardless of price.
A supply with only one or two cert stickers (almost all will have UL certification) is probably a bad supply, regardless of brand name. I know that Best Buy is selling some Antec supplies at a premium price with only 3 cert labels; I just went shopping for a new supply a couple months back and chose to avoid those Antecs for that reason.
yeh but if those supplies have a bazillion dollar pricetag I still wont buy them...
would one with four or five stickers do?
I believe ctkroeker was talking about a desktop. APCs are used for them (same with CRTs...). Laptops have batteries of their own... And an APC does not remove the need for a powersupply; they're only an intermediary power protection source.
You are looking for power supplies for a desktop, and not a laptop, correct?
yeah, sorry I got that mixed up. But anyways, it'll be good for your setup if you have one of those, it's also a power stabalizer, so just in case you have power flunctuations or shor power outage, your good to go. It's not a Desktop Computer power supply as student04 mentioned. Mussed have been pretty tired when I replied...