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.