As PC gaming continues to grow, more and more PCs are finding their way into the living room. As such, the demand for small, elegant computers that are powerful enough to be used as gaming machines is constantly on the rise. Several reputable manufacturers have presented products specifically designed for living room PC gaming, from subtle gaming cases to specialized keyboards/mice.

One major challenge with developing these small form factor (SFF) gaming systems is power. A gaming PC can require a lot of power, which can be an issue with cases that only support SFX PSUs. As the market for SFX units is very low and such systems were not expected to have high power requirements to begin with, there are very few designs available with a power output higher than 500 Watts.

SilverStone is a company that is strongly focused on the design and development of SFF cases, with several of their recent products designed to be used primarily as gaming machines. They are one of the very few companies that offer advanced, high performance SFX PSUs. In this review we are having a look at the SX700-LPT, their latest and greatest SFX PSU design. The SX700-LPT is 80Plus Platinum certified and has a maximum power output of 700 Watts, theoretically making it the most advanced consumer SFX PSU available today.

Power specifications ( Rated @ 40 °C )
AC INPUT 100 - 240 VAC, 50 - 60 Hz
RAIL +3.3V +5V +12V +5Vsb -12V
MAX OUTPUT 22A 22A 58.4A 3A 0.3A
120W 700W 15W 3.6W

Packaging and Bundle

SilverStone supplies the SX700-LPT SFX PSU into a relatively large cardboard box for an SFX PSU. The box is very sturdy and the PSU is sandwiched between thick polystyrene foam pieces, providing ample shipping protection. The most basic features of the PSU can be read at the front side of the box and more details are printed on the back.

The bundle of the SX700-LPT is spartan, with the company supplying only a manual, an AC power cable and four black mounting screws. The manual is extensive and detailed. SilverStone does not provide a SFX to ATX adapter with the SX700-LPT, which is peculiar considering that they do with less powerful units.

This is a fully modular design so every cable can be detached, including the 24-pin ATX cable. All of the cables are "flat", ribbon-like, including the thick 24-pin ATX cable. Apparently, SilverStone is trying to save as much space as possible. Be warned that these cables are much shorter than those of a regular ATX unit, with the ATX power cable being just 30 cm (11.8") long. Every cable is made by using black wires and black connectors, with the sole exception of the PSU-side connectors of the PCI Express power cables, which are blue.

SilverStone SX700-LPT SFX 700W
Connector type Hardwired Modular
ATX 24 Pin - 1
EPS 4+4 Pin - 1
EPS 8 Pin - -
PCI-E 6+2 Pin - 4
PCI-E 8 Pin - -
SATA - 9
Molex - 3
Floppy - 1
The SilverStone SX700-LPT SFX-L PSU
Comments Locked


View All Comments

  • usernametaken76 - Friday, September 30, 2016 - link

    That's why there's a 120mm fan to keep it cool, and it simply loses efficiency at that temp, it doesn't shut down (unless it's actually overheating) or melt. I have one and I don't even hear the fan kick on - which it will automatically when it gets hot.
  • Samus - Saturday, October 1, 2016 - link

    My SFX PSU fan rarely ever comes on, because it doesn't even crack 30C when the system is at idle. It starts spinning after 20 minutes of web surfing. Same with my video card, 970 blower doesn't even run until I go into a game.
  • Alistair - Friday, September 30, 2016 - link

    I have bought two of Silverstone's sfx-L power supplies, both had problems with the fan. The PSU looks awesome, but the fan's 0rpm mode doesn't work right, or it randomly makes weird sounds (crunching, or rising beep tone sounds, never heard that coming out of a PSU before). Check newegg reviews you'll see people with similar problems.

    After giving up on them selling me a quality PSU, I bought the new Corsair SFX power supply, and it is awesome. Save yourself the trouble and buy the Corsair one. You'll thank me.
  • Alistair - Friday, September 30, 2016 - link

    Also get the Lian Li Q10 case. It can cool anything. Literally it is amazing cold in there even with one 120mm fan. I have a GTX 1080 and overclocked to max i5-6600K and it is cool with the fans set to 600rpm. I even fit the Noctua U12S in that case!!!
  • jdon - Thursday, October 6, 2016 - link

    Tony Ou from Silverstone posted about this on another forum, and there is a more recent version of the 700w PSU with updates to the fan controller that should make things a bit less awkward for lower usage scenarios. To differentiate updated SX700-LPTs, you have to check the serial number. Numbers starting with 1621 or earlier are the original ones while numbers starting with 1624 and after are updated units.
  • Gadgety - Wednesday, October 5, 2016 - link

    This or the LianLi PE-750? Opinions please
  • InterClaw - Thursday, October 6, 2016 - link

    Any news on the SX800-LTI announced at Computex?
  • waltercarroll - Monday, October 17, 2016 - link

    Usually power supplies are not that much effective and for pc normal use or gaming i am desperate to have such a thing so that my pc board is not at risk.

Log in

Don't have an account? Sign up now