GMP FANLESS 300W ATX V2.01 ( 9PA300B001 )

The description of this item is not very informative. I don't even know what GMP stands for. This is the ZEN 300 fanless power supply, made by FSP. There are some reviews of it on the internet. In one of them, the unit they got was defective and did not work. I guess this may be typical for this model/company because mine also did not work. That's an automatic 1 star rating.However, if you are still interested in this power supply (a fanless PSU at this price is very interesting indeed) I can give you a little more info about it:-- It is surprisingly heavy. I'd say twice as heavy as a normal PSU. That's because The internal space is basically just several huge heat sinks. Interesting. Not necessarily a bad thing...who cares how much it weighs?-- This unit provides only 1 cable with SATA power plugs. It has several with the old-school molex 4-pin plugs. However, if you have more than two SATA devices (or these two devices are not right next to each other), you will need to get some molex-SATA adapters. They are super cheap, so it's no big deal, but I found this kind of annoying. I guess it just indicates that this is an older model. In a new computer you will most likely have zero devices that require molex.-- The 12 V cable that powers your CPU is just BARELY long enough to reach my receptacle. I'm in a standard mini-tower setup, so if you have a larger box, you may need to get an extension of some kind.-- Be aware that this unit does not have a power cable for a high power video card. Since this is only a 300 watt PSU you are probably like me and don't have a video card (or at least, not one that requires external power) but just be aware of that.A little more detail about my experience/setup:I wanted to replace the current (noisy) power supply in my main desktop. The computer has an i7-2600K processor (not overclocked), a hard drive, and a CDROM. No video card (onboard graphics only) or anything else. Very lower power computer, actually, which is why I thought a silent PSU might be good. The motherboard requires a standard 24 pin connector and the 4-pin 12V connector for the CPU. Anyway, I swapped out my old PSU for this one and hooked everything up. Pressed start, an the power light flashed on for part of a second only and then turned off. I disconnected it and reconnected the old power supply in the same configuration and it worked fine. I also tried turning it on with all the devices unplugged except the 24 pin and the CPU cable. Bios never got to the point where it beeped. Tried this several times with various configurations without any success. So I had to take it out and reinstall my old power supply. Not my first time replacing a power supply but my first time having it not work, unfortunately.I requested a return and said the unit is defective. I got automatic approval but they are making me pay return shipping. Frankly I didn't even know that happens at all at Amazon--it wasn't my fault that the unit does not work. I guess it really is better to buy from Amazon itself rather than sellers. I wouldn't suggest taking the risk on this item/seller. If you get a working PSU it would be great (good price and great product) but you risk having to pay return shipping and having to hassle around with your computer a lot if you get a bad one.

I bought two of those - first one did not work at all. It powers up but then it shuts down, so not much to comment here. Second one worked ok for a few weeks, next, after it would get warm, if reset/power off, it won't start until it cools down, then after 6 months it would behave like the first one. Both were used in systems that work fine with 200W PSUs. Main reason for me was noise - but with a quiet power supply and low-noise fans I'm very close to this - also the dissipated heat seemed to be quite high for this PSU - might be an issue with materials/cooling of the heatsinks. Did not bother to try returns - it's another investment to 'China wellbeing fund'.