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Chapter 2: Hardware information
2.5 System memory
2.5.1 Overview
The motherboard comes with four Double Data Rate (DDR) Dual Inline
Memory Module (DIMM) sockets. These sockets support up to 4GB
system memory using 184-pin unbuffered ECC or non-ECC PC3200/
PC2700/PC2100 DDR DIMMs, and allow up to 6.4GB/s data transfer rate.
The following figure illustrates the location of the DDR DIMM sockets.
2.5.2 Memory configurations
You may install 64MB, 128MB, 256MB, 512MB, and 1GB DDR DIMMs into
the DIMM sockets using the memory configurations in this section.
Important notes
1. Installing DDR DIMMs other than the recommended configurations
may cause memory sizing error or system boot failure. Use any of
the recommended configurations in Table 1.
2. In dual-channel configurations, install only identical (the same
type and size) DDR DIMM pairs for each channel.
3. Always install DIMMs with the same CAS latency. For optimum
compatibility, it is recommended that you obtain memory modules
from the same vendor. See list of qualified vendors on page 2-12.
4. Make sure that the memory frequency matches the CPU FSB
(Front Side Bus). Refer to Table 2.
5. DIMMs installed into any three sockets will function in single-
channel mode.
6. When all four sockets are populated with 1GB DIMMs (total 4GB),
the system may detect only 3+GB (a little less than 4GB) due to
ICH5 resource allocation.
P4C800
®
P4C800 184-Pin DDR DIMM Sockets
80 Pins 104 Pins
DIMM_A1
DIMM_A2
DIMM_B1
DIMM_B2