Asus P4R800-VM - Manual (Page 24)

1-14 Chapter 1: Product introduction
1.8.3 PCI slots
The PCI slots support PCI cards such as a LAN card, SCSI card, USB card, and
other cards that comply with PCI specifications.
1.8.4 AGP slot
The Accelerated Graphics Port (AGP) slot that supports AGP 8X/4X (+1.5V) cards.
When you buy an AGP card, make sure that you ask for one with +1.5V
specification.
Note the notches on the card golden fingers to ensure that they fit the AGP slot on
the motherboard.
This motherboard does not support 3.3V AGP cards. Install only +1.5V AGP
cards.
P4R800-VM
P4R800-VM Accelerated Graphics Port (AGP)
Keyed for 1.5v