12V for the ATX. The PSU has 20 Pin Plug & 4 Pin plug bunched together which connect into the mobo connectors.
The mobo also has a second 4 pin connector for ATX 12V, and the PSU also has a separate 4 Pin ATX plug for ATX - Do I need to this plug since I have the 4 Pin connected next to the 20 Pin Plug.