Silverstone SX800-LTI power supply packs 800W into SFX-L

System builders looking for lots of power and efficiency in their high-powered compact PCs should take a gander at Silverstone's SX800-LTI 800W power supply. The SX800-LTI has the highest-available 80 Plus Titanium efficiency rating and delivers 800W of continuous power from an SFX-L form factor. The company claims that combo is good for a power density of 775W per liter. For an apples-to-car-engines comparison, a Mercedes-Benz CLA 45 AMG's 375-horsepower, 2.0L engine produces over 132,000 watts per liter of piston displacement.

Silverstone says this mighty mite can deliver up to 66A on the +12V rail. Four eight-pin PCIe connectors allow the PSU to power a pair of demanding graphics cards with twin eight-pin connectors. The SFX-L form factor lets Silverstone use a 120mm fan inside a chassis that measures 4.9" x 2.5" x 5.1" (125mm x 63.5mm x 130mm), and that fan only spins when power supply load exceeds 30%. Japanese capacitors are presumably part of the reason Silverstone quotes a mean time between failures of 100,000 hours. Those obsessed with cable management will appreciate the all-modular flat cable design with multiple provided lengths of some cables. Silverstone didn't announce pricing or availability for the SX800-LTI, although it probably won't come cheap.

Comments closed
    • Dudeface
    • 3 years ago

    Yeah, but ask that AMG engine to produce 280kw continuously. I wonder how long it would last…

      • Anton Kochubey
      • 3 years ago

      Quite a while, I bet. German car manufacturers rate their engines for continuous WOT operation on the Autobahns.

        • synthtel2
        • 3 years ago

        I’ve heard that before, and it makes sense for N/A engines, but I’m skeptical of its application to modern turbo engines pushing 20-25 bar BMEP at 10:1 or (in this case) over 30 bar BMEP at 8.6:1. It’s certainly possible to build engines to take that kind of stress at 100% duty cycle, but it isn’t cheap, and I wouldn’t want to be the first to find out whether any particular engine is up to that kind of standard.

    • Chrispy_
    • 3 years ago

    Makes sense, seeing how some stupid case manufacturers are compromising on PSU size comptability to make room for eight-hundred radiators and four acres of RGBLED-lit glass panelling.

    I’ve certainly seen cases recently that are bigger than full ATX towers of old that only support SFX psus and mATX boards.

    • DPete27
    • 3 years ago

    I really don’t see the purpose of SFX-L. Silverstone uses SFX in their smallest cases because the PSU is short. Now they’re pushing SFX-L….what is that, basically just an ATX length but half as tall? Not sure that has any real benefits to case size.

    • EndlessWaves
    • 3 years ago

    [quote<]For an apples-to-car-engines comparison, a Mercedes-Benz CLA 45 AMG's 375-horsepower, 2.0L engine produces over 132,000 watts per liter of piston displacement.[/quote<] I couldn't find dimensions but apparently the 265KW version of the M133 engine weights 148kg, giving 1791W/kg Silverstone's SX800-LTI weighs 1.7kg, giving 471W/kg Now if only the CLA45 was silent when putting out less than 112 horsepower.

      • davidbowser
      • 3 years ago

      I can testify that there are pretty much ZERO AMG owners that wish their car was more quiet. Some might wish it were more efficient, but the noise AMGs make is oh so beautiful.

      • Chrispy_
      • 3 years ago

      Can I have that in dBA per cubic flOz?
      Your units confuse me.

    • derFunkenstein
    • 3 years ago

    This is a real “wtf” product for me. 800W in a [url=https://www.pcper.com/reviews/Cases-and-Cooling/SilverStone-500W-SFX-L-Series-Power-Supply-Review<]deeper-cabinet[/url<] SFX form factor. 80+ Titanium? Hey, cool. 800W with four eight-pin connectors? Great. Stuff it into an SFF box where the PSU might be just a little too deep to fit comfortably? /recordScratchingNoises

      • JustAnEngineer
      • 3 years ago

      Silverstone invented the SFX-L power supply form factor for their Raven RVZ01 / Milo ML07 / Fortress FTZ01 cases to allow larger fans than will fit in an SFX power supply.

        • derFunkenstein
        • 3 years ago

        Great. So what’s going to use all that power?

          • JustAnEngineer
          • 3 years ago

          Do you have an overclocked Radeon Pro Duo installed in your mini-ITX PC?

    • JDZZL
    • 3 years ago

    Let’s convert that over to HP(Horse Power) and really go down the rabbit hole…

      • JustAnEngineer
      • 3 years ago

      800 watts รท 746 = 1.07 horsepower
      However, you’d still have to deal with the efficiency of the motor. If it’s 93%, we come out pretty close to 1.0 hp on the drive shaft.

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