Nvidia NFORCE 650I - Manual (Page 19)

Mainboard nForce 650i Ultra
15
Slots
PCI-Express x16 Interface slot: PCIE x16
The mainboard allows you to install a graphics card, which the PCI-Express x16 interface,
supporting one-way bandwidth up to 4 GB/s, is compatible to this PCIE x16 slot.
PCI-Express x1 Interface slots: PCIE x1_1/ PCIE x1_2
The PCIE x1_1/ PCIE x1_2 slots are the PCI-Express x1 interface slots which can be supported
up to x1 mode. You can insert expansion cards which are PCI-E x1 compatible onto these
slots.
PCI Interface Slots: PCI1/2/3
PCI stands for Peripheral Component Interconnect, which is a bus standard for installing
expansion cards such as network card, SCSI card, etc. to these PCI slots.