Silverstone Flex Series FX350-80Plus Power Supply

I was wary of buying this after many complaints about noise for the V1.0 but it seems like they've done away with the hybrid mode and just have the fan constantly on but it spins at such a low RPM you cannot hear it over anything else. I'm all about low noise computing and this is definitely the most silent in my system (well apart from my SSDs). I have an i7-4790K paired up with a GTX970 and they draw a little over 250W from the wall at max load and this PSU never breaks a sweat and doesn't feel hot and never spins up, even in my lovely looking but poorly ventilated Jonsbo UM3X case.

Office pc had a very noisy psu fan so thought I'd give this a shot looking for as close to silence as possible on a budget. Straight forward fitting, came with a plate which my case needed as the old psu was larger (as well as whooshing like a hoover). Switched on and I have to admit that I initially thought it wasn't powering as there was no sound at all but pc booted and works perfectly. The thing is genuinely silent - at least within reasonable parameters. Highly recommended for modestly spec'd pc's.

Picked up the SST-SX700LPT to go into a mini-ITX build and thus far doing the job perfectly fine. With 700w the unit is capable of feeding most CPU and GPU combinations around and for most the at much less then its rated capacity for typical parts so works fine in that regards. This unit is of course the slightly longer SFX-L and the extra housing is used to accommodate a larger 120mm fan. For most the part under low loads the fan does not spin at all (provided it also has adequate airflow) and only when it gets hotter under a load such as gaming, will the fan spin up, though to be honest even then, its fairly inaudible to me. There are plenty of cables included of the flat ribbon variety and thankfully this time unlike my last purchase of a SFX silverstone PSU, they actually include a UK model kettle lead. Oddly unlike with the 500w SFX-L unit from Silverstone also, they have not included a SFX to ATX power bracket, so you will need to buy one if you plan to eventually put into a ATX case, something that would make more sense with a 700w supply over a 500w supply to be honest. Anyways, it does what it says on the tin. If I did not have the custom sleeved cabled, I think I may have looked at the 600w corsair SFX unit to be honest, as its much cheaper yet looking at online review's (JonnyGuru) and the like performs even better in area's like ripple and 600w is adequate for most builds.

I had read reviews about this PSU, and various hacks replacing the PSU fan. However I mistakenly figured that since the machine would not be under much load (it was previously running in an Antec ISK110 with a 90w PSU) that it would not be loud or possibly not need to spin the PSU fan up at all. This is NOT the case and the PSU fan runs constantly with a persistent whirring sound. I had to rebuild the machine a second time into a different case as I could not stick the noise. If noise is an issue, I would not recommend :(

Not sure what other reviewers have done to this PSU but I have found it to be nice and quiet with plenty of juice to run an i5 and Nvidia 1660 super which is powering my VR setup from a mini case. Noise is my enemy with a PC build and using a smaller case is always a problem but not with this one. Sure it ramps up a bit when full on gaming but I'm in the zone at that point and don't care. If you need a 450W SFX supply, go ahead and get it.

This is a great power supply for my new NAS/Media Centre. I have yet to hear the fan come on at all, the hard drives are the only thing I hear. It comes with a ATX adaptor, but this does not allow the PSU sit on the floor of my particular case, I bought the SilverStone SST-PP08 SFX to ATX PSU Converter - Black to solve this and you get a better clearing between the PSU and HDDs mounted above. System is: Fractal Node 304 Asrock J4205-ITX Syba 4xSATA Expansion Card 2x SSD (OS & Cache) 6x 4TB HDD (Stablebit Drivepool) 18w idle, 40w (drops as the unneeded drives turn off)

PLEASE DO NOT BUY THIS AND GO THROUGHTHE SAME PROBLEMS AS I HAVE! I am a PC proffesional over 10 years experience. I tried this new brand out Silverstone and it was the worst idea ever not only the cables and pins looked very off shape but the plugs in the back of the psu are extremely tight and narrow so you have to use more force then normal not to mention the 24 pin is so short if you have any GPU that is GTX series the 24 pin will not reach over the card from where it is placed no matter how big the ATX motherboard is as I had mini ATX and a standard size ATX. When I first went to power this up it never turned on and all I heard was 2 clicking noises inside the fan. This maybe a previous dodgey PSU and was sent to me by accident which I hope it was because for the price I wouldn't pay any more then £100. The company Silverstone from China and I highly recommend not buying this at all and stick to the decent brands you know best like Corsair.

Nice compact PSU which fits nicely in even the most cramped chassis. The big problem with it is the truly crazy noise levels it puts out. Running with an ARM board with a single NVMe drive (probably about 70-80w) the noise output is easily the loudest component in my entire rack. It's worse than a graphics card under full load .. and I can hear it in the next room. If you buy this you need to factor in another 10 or 11 ukp for a silent fan. I recommend the noctua NF-A4-10.