2-7
ASUS AP140R-E1 1U barebone server
2.3
System memory
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.
The following figure shows the location of the DDR DIMM sockets.
2.3.1 Memory configurations
PSCH-LR
®
PSCH-LR 184-Pin DDR DIMM Sockets
80 Pins
104 Pins
DIMM_A1
DIMM_A2
DIMM_B1
DIMM_B2
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.
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 about 3.6GB (less than 4GB) due to
ICH resource allocation.