Asus a7n8x Motherboard DIY Troubleshooting Guide - Page 18

1.7 System memory The motherboard has three Double Data Rate (DDR) DIMM sockets that supports up to 3GB non-ECC PC3200/2700/2100/1600 DDR.. 104 Pins ® A7N8X 80 Pins A7N8X 184-Pin DDR DIMM Sockets 1. To enhance system performance, utilize dual-channel feature when installing additional DIMMs. Install the DIMMs in any of the following sequence: Sockets 1 & 3 or Sockets 2 & 3 or Sockets 1, 2 & 3. 2. DIMMs with more than 8 devices on each side of the module are not supported. 3. Make sure the memory frequency and bus frequency setting in the BIOS are the same or set to [Auto] ensure system stability. 4. 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. 5. Visit ASUS website (www.asus.com) for latest DDR400 Qualified Vendor List. 1.7.1 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. 1.8 Expansion slots The A7N8X motherboard has six (6) expansion slots. The following sub-sections describe the slots and the expansion cards that they support. 1.8.1 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. 1-8 Chapter 1: Motherboard Information