FSP Group Mini ITX Solution/Flex ATX 80 Plus Gold 400W high Efficiency Power Supply

This review is for the FSP 500W 80+ Platinum without 6-Pin GPU PCI-E connector.Overall:I am using a 5USD 12V Molex to PCI-E 6-Pin adapter to use this power supply with a GPU.This power supply is awesome. I bought the Athena Power 500W silver before from Newegg and was very disappointed. The Athena is extremly noisy even in idle and geta very hot under load.The FSP instead is extremely silent in Windows 10 idle (Ryzen 2600, GTX 1060 6GB) and only revs up under load. Even under load though the FAN is definitely hearable but is a nice hum with a medium tone frequency. The FSP gets also very warm (not hot) under load. My guess with touching it with my hands is 40 Celsius) but cools down right away after load and the fan will also revv back down to very silent.My main rig is watercooled with a 750W Seasonic Platinum power supply which does not get warm at all. So my main build ia nearly dead silent. Even with that reference I am positively pleased how silent super small builds with mid range components combined with this FSP Flex ATX power supply can be. Would not have been possible a couple yeara back.PROS:SilentEfficientSturdy casingA lot of power for such a small form factorMuch better than the Athena Power 500W silverConsVery long cables and in general too many SATA and Molex connectors -- an issue when you want to pack it into a small case and have to stuff the cables somewhereNo PCI-E output

I actually bought this 400w because I only plan on using 200w, the 40mm fan in it causes a little bit of noise as other has pointed out. I actually replaced it with a noctua fan, but keep in mind that it's dangerous, It needs a high speed 40mm to stay cool and me putting in what is a much lower rpm 40mm can cause it to over heat. The fan does have a temp control so the fan that is provided spins up and down as needed. But I purposefully over bought in watts so that I wouldn't need as much cooling and could keep the noise down. tiny fans like 40mm are notorious for whining. But voltage is still rock solid and it looks to be having no issues.

I'm not a big fan of the Flex-ATX form factor, but it DOES allow for some tiny builds. For me, that was an AMD 3700X and a 1660 Super on an x470 board; all inside of an SGPC K39 from Aliexpress which allows me to fit an entire gaming setup in my backpack. When I picked up my case, I had also purchased a random Chinese branded Flex-ATX unit which had a lot of good reviews... It worked well enough, but that was until I decided to do some heavy gaming at a LAN party, where the unit failed one me.So far, this FSP unit has not let me down.The price is a bit high for a 500W power supply, even a Platinum rated one, in terms of normal ATX units. That's kind of the thing though, you're going to pay more for Flex-ATX, and going the little extra for a nice FSP unit as compared to something from Aliexpress is honestly worth it. If you're reading this nonsense and considering this unit for your build, I'd say just go for it! For 500W Platinum in THIS form factor, and especially the brand, the price is really not that bad.You DO have to use a power adapter for the GPU though. I've got a double molex to GPU power connector, and that seems to be working well. This isn't a huge negative, but would be annoying to sit down and build and realize you don't have a power connector for your video card. Easy ~$8 fix on Amazon if you don't want to be bothered rigging one up yourself.And now... The fan noise.The fan IS quite loud at full tilt. When you first power up it will sound like a dang vacuum cleaner for a few seconds as it ramps down to a normal idle speed, which is nearly silent. Under light loads like a bunch of Chrome tabs, Discord, Coding, Image Editing, whatever non-gaming things you're typically up to; this thing is mostly silent in my experience. IT DOES get quite noisy under some more demanding gaming loads. However, my old Flex-ATX unit (the Aliexpress one that fried) was even louder with its stock fan as compared to this unit, and supposedly had the same wattage output, so the noise level on this thing isn't actually all that bad for Flex-ATX. The Noctua fan mod does help, my old one DID go very silent after I did the noctua fan swap that people recommend. I've heard of people doing the same thing to this unit, though I wonder if the airflow with the thinner fan wasn't the reason for my other unit failing, so I've yet to make the swap on this one. I would imagine you'd get that similar near silent performance, though the stock fan -is- better than other Flex-ATX units from what I've seen, and the fan noise is less of an issue altogether if you game with a headset.10/10 power supply performance all things considered.If you're going Flex-ATX, you should DEFINITELY consider this unit.