If you've been considering building a small PC with a Mini ITX motherboard and Mini ITX chassis, you have probably noticed that these chassis won't fit a standard ATX power supply. You are limited to the SFX form factor, and while there isn't as much choice in this segment, Hardware.Info tested four different ones to find out what's the best one out there.
An SFX PSU measures 12.5 cm x 6.4 cm x 10 cm, quite a bit smaller than ATX in other words. When we told all the main PSU manufacturers we were doing a round-up of small form factor power supplies, we received only four, as there apparently aren't that many out there. We tested the FSP FSP300-60GHS 300W, Seasonic SS-300SFD 300W, SilverStone SFX ST45SF 450W and SilverStone SFX ST45SF-G 450W.
FSP FSP300-60GHS 300W
The FSP 300W model uses two 12V rails of 14A and 16A. The maximum combined capacity is not specified. The PSU has a single molex connector that's 7x SATA. It does not have an 8-pin CPU connector, only a 4-pin. It's rare to see modular SFX PSUs, and this one is not different. The PSU has a single 8 cm fan and weighs 0.8 kg. Its average price is £44. This power supply is included with various Mini-ITX chassis, including the Fractal Design Array R2 300W and the Lian Li PC-Q15.