









⚡ Power your compact build with gold-standard efficiency and whisper-quiet confidence!
The SilverStone SST-FX350-G-USA is a 350W Flex ATX power supply designed for small form factor PCs and embedded systems. Featuring 80 PLUS Gold certification, a single +12V rail, and a quiet cooling fan rated at 32.9dBA, it delivers reliable, energy-efficient power 24/7 at 40℃. Its all-black lead-free paint finish and sleeved cables offer a premium, professional look tailored for enthusiasts and professionals seeking compact, high-performance power solutions.









| ASIN | B07QGMX5DW |
| Best Sellers Rank | #1,507 in Computer Power Supplies |
| Brand | SilverStone |
| Compatible Devices | PC |
| Connector Type Used on Cable | ATX |
| Cooling Method | Air |
| Customer Reviews | 4.3 4.3 out of 5 stars (321) |
| Form Factor | ATX |
| Global Trade Identification Number | 00844761017897 |
| Item Dimensions | 3.21 x 1.59 x 5.91 inches |
| Item Weight | 0.96 Kilograms |
| Manufacturer | SilverStone Technology |
| Maximum Input Voltage | 264 Volts (AC) |
| Mfr Part Number | SST-FX350-G-USA |
| Minimum Input Voltage | 90 Volts (AC) |
| Model Name | SST-FX350-G-USA |
| Model Number | SST-FX350-G-USA |
| Number of Fans | 1 |
| Output Wattage | 350 |
| System Bus Connector Type | 6 Pin |
| UPC | 844761017897 |
| Upper Temperature Rating | 40 Degrees Celsius |
| Warranty Description | 3 Years Parts and Labor |
| Wattage | 350 watts |
J**E
Very solid choice
This is a great PSU. It is a bit noisy if you are anal like me and others on this review page. If you'd like to void the warranty and put a quieter fan in this PSU my suggestion after trying the noctua route is to not use noctua (the fans people are recommending on this review page are not rated for this psu in terms of cooling efficiency and in my case the fan wouldn't even turn on unless I hooked it into my fan header on my motherboard even though its 12v in the psu and on the noctua fan. A more proper recommendation and expert advice would be to purchase Delta AFB0412HB 12V DC 0.16A Fan 40mm x 40mm x 15mm from ebay for 6 dollars. Be sure to check the polarity of the 2 pin/wire for this fan to ensure it matches the existing scheme/configuration. I believe its reversed but like I said, check for yourself. But Delta AFB0412HB 12V DC 0.16A Fan 40mm x 40mm x 15mm is a much better option than the Noctua. Don't waste your money on the noctua 40x10mm as not only is it too small and would require duct tape to cover the gap on the outside of the psu after its installed, its not even strong enough to push air in an efficient manner. Anyhow I wish you all good luck in your DIY this psu. For those not that are not ANAL like me, the noise is really not that bad. But I'll let you be the judge as I have tinnitus so I hear ringing in my ears anyway.
M**S
Works as expected
Little loud, little pricey, and I wish it was modular -- but it's important that I rate this good - because when I bought it 6 months ago, I think it had a 3.5 or 4 star review overall, and that almost wasn't good enough for me to spend the money on it. But I have stress tested it under heat, dog hair, vibration, weird power surges, poor cable management, and wiring mistakes. I'm told replacing the power supply's internal fan will help with noise, so I came back to the listing to check out the specs. Totally recommend this PSU for someone building a tiny ITX computer. Mine is powering a 1660Ti ventus xc (physically modified to fit case), MSI H510i Pro, 16gb ddr4, i5 10400f, m.2 ssd, two sata ssds, and an noctua NH-L9i. Never had trouble! And I am playing the latest games at high settings despite having a 9x13x3 computer.
S**T
Noisy Fan, Long Cables, but Good Power Supply
There is a reason they don't show you images showing all the cables viewable and probably would not have very many returns if they set that expectation for the customer. I put this in the A09 itx 3.8L case with 7700X 105W CPU for a productivity machine... There was no way all those cables were going to fit in there so I removed all but the motherboard power cables. Tested everything out before putting in the case and fan was not loud because the system was idle. Several minutes after getting into the case this thing sounded like a server room or vacuum cleaner when it comes to noise level. I was going to replace the fan with Noctua but it was going to be a challenge and found info that expressed that it may not provide enough airflow to properly cool this Power Supply but I will research more to validate. This thing does a great job for my needs and the cables might not need to be modified if you were to go into a larger case but you really can't get much smaller than this A09.
D**5
The little engine that could
These Silver Stone Flex PSUs are great and reliable. The only thing which for me is a fine trade off is the noise level is a little high. But it’s worth it. A lot of PSUs at this size are iffy at best. So it’s an easy recommendation.
L**S
Loud but easy to fix
This PSU fan is loud but it’s such an easy fix, and with these small PSUs being really hard to find, especially powder coated for aesthetics, I bought one anyways. The process for replacing the fan with a noctua one was incredibly simple, albeit it will void your warranty. Besides this caveat the new fan brought many benefits, namely the much quieter operation but also the ability to control the fan speed from the bios.
M**T
You cant hear this thing running .
You cant hear this thing running . I purchased a replacement fan reading the other reviews.. Nope, you dont need it. You cant hear this thing running at all with the stock fan. Installed in a 1U rack mount. I did need to trim extra power leads I did not need as the cables are insane long and thick. This is a very nice power supply and I do recommend it.
J**.
A bit noisy, stiff cables... Mod fan!
If you have ANY experience with computer hardware, you may know that a computer naturally isn't very loud unless it's dusty, cheap, or under a heavy work load. This power supply makes a sound that isn't exactly what I'd call "annoying", but definitely present. It's like the sound of a tower fan in your room that's kind of old; it's not annoying, but it isn't soothing like white or brown noise. Besides the noise, the cables are stiff. I haven't built into my ITX case yet, but using this PSU as a bench supply is not exactly easy. I'm going to mod a Noctua 4x10 FLX into this PSU and give an update within the month. UPDATE 9/9/20 After replacing the fan, cooling seems fine (despite cfm differences in fans). There's 5 screws: 4 sides screws (one warranty screw) and 1 screw underneath a version sticker (mine included one). With the 12V FLX variant of the Noctua 4X10, I was able to replace the fan. Another thing to note is that the stock fan seems to be stuck in place with the metal fan grill plate (besides the 2 screws that keep the fan in)-- I had to break the fan to actually remove it. It's not 100% silent, but WAY WAY more tolerable and almost silent within a foot from the supply. Will update again if there's any overheating issues. UPDATE 8/28/21 (Almost a year of use) I've had no issues with overheating, shut offs of the power supply, or noise complaints within my case. UPDATE 8/18/22 (Almost two years of use) Still no problems with the modified Noctua fan and the computer that’s using it is on at least 6-10 a day. No overheating, no shut offs, no weird sounds. UPDATE 5/19/2025 (Basically 5 years of use) Currently the computer sits in the kitchen as a family PC, letting it be exposed to some smoke and oil/grease in the air. No problems yet.
S**O
Es una buena fuente de poder, la verdad es de muy buena calidad aunque algo ruidosa.
A**Y
Solid PSU. Fits nicely into a Watchguard M470 firewall that runs OpnSense. Do note that the fan when it kicks in is a bit louder than desired, and there are several guides on how to change out the fan. Note: Those guides will void warranty, and heed the advice given - don't use a Noctua fan, it doesn't shift enough air.
A**N
Es un poco ruidosa cuando se le demanda pero no agobiante, pero lo cierto es que varias fuentes flex atx lo son. Es mas para builds ultra compactas y en eso cumple su funcion muy bien.
S**G
Very stable power supply ! I use it for power up motherboards on my test bench.
E**C
Working as described, perfect for a small form factor PC build. I like the fact that this power supply comes with sleeved cables and an external on/off button. However, the fan of the power supply can run loud, definitely not described as "slightly louder than whisper" as I can easily hear it in the background through my earbuds with foreground music.
Trustpilot
5 days ago
4 days ago