NEC N8100-1223F User Manual page 387

Upgrading Your Server 9-25
There are three types of PCI boards: 5V PCI boards, 3.3V PCI boards, and universal PCI boards.
A 5V PCI board must be installed in the 5V PCI slot, and a 3.3V PCI board must be installed in the
3.3V PCI slot. A universal PCI board can be installed in any PCI slot.
5V PCI board 3.3V PCI board Universal PCI board
The PCI Express boards are x1, x4, x8, and x16. The server can contain x1, x4, and x8 PCI Express
board.
PCI Express board (x4) PCI Express board (x8)