Summary: Looks better and runs quieter and cooler than the HP oem power supply. Fits a lot of PCs. I thought that I was going to have to cut off the last 4 pins of the 24-pin mo-bd connector, but the connector is actually 2 connectors that slide together as one and can be easily separated. This was not the power supply that I originally ordered but I was allowed to upgrade at no additional cost and it arrived 2 days sooner than my original one ordered.
Summary: Don't give these guys your money, they don't deserve it.
Pros: Coolmax has been "updating" this model of PSU, but mostly downgrading it further. It does have some pros though...barely. It uses a nice quality fan, and even though it's wired straight to the 12V all the time (No thermal fan control whatsoever) it stays quiet, and the bearing has plenty of grease so it shouldn't fail. The older revision of this PSU used the infamous two transistor circuit for the +5VSB, which wasted a lot of electricity and killed lots of motherboard...
Cons: Everything else... The old revision (Circa 2009) could pump out about 350W, this one is capable of about 275W (With a very mixed rail load). It claims two 12V rails capable of 348W. HA! It only has one rail, and it uses a 16A ultra fast rectifier. Since the fan runs fast keeping it cool, I bet it could do the full 16A, but that's only 192W...Almost 90% of your computer uses the 12V. That makes this basically a 200W PSU in a modern system. And if you load it up, that 1...
Pros: It worked for the 30 minutes that I used it...very loudly.
Cons: The box advertises a fan switch, and the unit pictured on the box shows on. This switch is missing from the actual unit, and the thing sounds like a jet engine with the PC mounted in the computer desk. It's literally intolerable. Fix the packaging and don't advertise a switch that isn't there.
Summary: The power module installs easily. It's well-made and looks good. I can speak to longevity, because it's only been in a month--but is seems to run well, does run quiet, and is apparently a good unit.
Summary: I have other power supplies that have been working for years quietly, without requiring to be lubricated. I cannot recommend this unit to anyone.
Pros: I bought two units and both have been working fine for years. The units are very quiet if they don't need lubrication. They worked after the hurricane Sandy, when some other PSUs refused to turn on, probably due to flaky mains power.
Cons: Both units became noisy after a few years of use. I had to open both of them and lubricate the fans with garage door lubricant. Both are quiet again. The device shows its age. Who needs so many molex and floppy connectors? And 2 SATA connectors are not enough for anything beyond the simplest setup (one hard drive and one optical drive).
Summary: Used it about 3weeks now; no issues. I probably would not have bought if I had just read all the negative reviews here 1st, but it turned out to be a great power supply. Note: Description is WRONG, there isn't a 3speed fan switch, but all the other information for power and cable arrangement seems to be correct. It is extremely quiet and very cool. I have run it non-stop for days and powered down and up many times.