One of specifications developed by SSI (Server System Infrastructure).
Aiming for server market growth, SSI is an organization to standardize components including board, chassis and power supply equipment, which has authority over server market.
For EPS12 electric power supply: 3 sizes with different depth.
1.WxHxD (mm)=150x86x140 (PS/2 size)
For output connecter: Main connecter with 24 pin connecter same as version after ATX12Vver2.0.
For +12Vconnecter: 8 pin connecter (processor connecter) different from ATX 4 pin connecter.