SilverStone has developed a new 80 Plus Gold power supply for small systems. While most 80 Plus Gold power supplies have high capacities, SilverStone's new creation is a more modest 450 watts model. The power supply bears the model number ST45SF-G and is based on the smaller SFX form factor. This makes the PSU fit in smaller chassis as well, which can't hold regular ATX power supplies. Nevertheless, a bundled adaptor allows the power supply to be installed in an ATX slot.
The new 450W power supply is completely modular and ranges in efficiency between 87 and 90% at loads of respectively 20% and 100%. The 450 watts capacity is continuous, as long as the ambient temperatures remains below 40 degrees Celsius. The PSU has a single powerful +12V rail, which can provide up to 37 Amps. A quick conversion reveals that the +12V rail delivers 444 watts, almost the entire capacity SilverStone has specified. With these specifications, the power supply can be used in compact systems, based on a quad-core processor, mini-ITX motherboard and relatively high-end graphics card.
The voltages have an error margin of no more than 3%, with ripple values also being quite low, SilverStone claims. The PSU is cooled by a single 80 mm fan, which produces only 18 dB(A) at its lowest setting. The single 8-pin and dual PCI-Express 6-pin power connectors allow a wide variety of graphics cards to be used.
Naturally, the SST-ST45SF-G power supply features Active PFC technology and protection from overload, overvoltage, undervoltage, short-circuiting and so on. The PSU is sized 12.5 x 6.35 x 10 centimetres and weighs 1.45 kilograms. Additional details can be found on SilverStone's website.
New SilverStone 450 watt SFX power supply with 80 Plus Gold certificate