I had to shop for a power supply for my desktop. I visited a couple of computer part retailers and looked at their lists of power supplies — there are a lot of brands out there! and they make competing claims about what to look for. “One rail! Better than two or more!” “4 rails! Better than 1 rail!” “80+ Bronze” “780 Watts — Peak” “620 Watts — Continuous” So I looked for some help in interpreting all this.

I found jonnyguru.com. What a great site! They explain all the features you might want in a power supply, and explain why vendors make the competing claims (like 1 rail vs 4 rails) in plain English. Check out the FAQ for everything you need to know, concisely. They have some very nice reviews too — worth a read just to admire the review.