As the standards bearer of SFF (small form factor) cases and SFX PS us, silverstone has released a Reference power supply design for the masses in the st30sf, a 300W SFX unit designed with High affordability and great performance. It has 80 plus Bronze efficiency and a silent running fan for class leading efficiency and low noise. To enable users to easily take advantage of this excellent SFX power supply, an adapter is included to convert st30sf to mount in any ATX case in addition to ones that fit only SFX. For SFF users, the st30sf is an excellent, well-rounded power supply for any DIY desktop computer. Supports standard SFX form Factor and ATX via included bracket 300W continuous power output at 40? operating temperature rated for 24/7 operation 80 plus Bronze level efficiency (82% 85% efficiency at 20% 100% loading) Class-leading single +12V rail Silent running 92mm fan (V2.0) MODEL NO - ST30SF-V2