Asus A7N8X-VM 400 A7N8X-VM/400 User's Manual - Page 18

1.8 System memory The motherboard has two Double Data Rate (DDR) DIMM sockets that supports up to 2GB non-ECC PC2700/2100 DDR DIMMs. A7N8X-VM 400 104 Pins 80 Pins A7N8X-VM 400 184-Pin DDR DIMM Sockets A DDR DIMM is keyed with a notch so that it fits in only one direction. DO NOT force a DIMM into a socket to avoid damaging the DIMM. Installing a DIMM 1. Unlock a DIMM socket by pressing the retaining clips outward. 2. Align a DIMM on the socket. Make sure the notches on the DIMM exactly match the notches in the socket. 3. Firmly insert the DIMM into the socket until the retaining clips lock into place. 1.9 Expansion slots The A7N8X-VM 400 motherboard has three (3) PCI and one (1) Accelerated Graphics Port (AGP) expansion slots. The following sub-sections describe the slots and the expansion cards that they support. 1.9.1 Configuring an expansion card Some expansion cards need an IRQ to operate. Generally, an IRQ must be exclusively assigned to one function at a time. In a standard design configuration, 16 IRQs are available but most are already in use. Normally, 6 IRQs are free for expansion cards. Sometimes IRQs are "shared" by more than one function; in this case, IRQ assignments are swapped automatically or adjusted through the BIOS firmware. 1-8 Chapter 1: Product Information