Asus E2234 Computer Hardware User Manual


 
ASUS P5NSLI Series 1-17
1.7 System memory
1.7.1 Overview
The motherboard comes with four Double Data Rate 2 (DDR2) Dual Inline
Memory Modules (DIMM) sockets.
A DDR2 module has the same physical dimensions as a DDR DIMM but has
a 240-pin footprint compared to the 184-pin DDR DIMM. DDR2 DIMMs are
notched differently to prevent installation on a DDR DIMM socket.
The gure illustrates the location of the DDR2 DIMM sockets:
Channel Sockets
Channel A DIMM_A1 and DIMM_A2
Channel B DIMM_B1 and DIMM_B2
1.7.2 Memory configurations
You may install 256 MB, 512 MB, 1 GB and 2 GB unbuffered non-ECC DDR2
DIMMs into the DIMM sockets.
For dual-channel conguration, the total size of memory module(s)
installed per channel must be the same
(DIMM_A1 + DIMM_A2 = DIMM_B1 + DIMM_B2).
Always install DIMMs with the same CAS latency. For optimum
compatibility, it is recommended that you obtain memory modules from
the same vendor. Refer to the DDR2 Qualied Vendors List on the next
page for details.
Due to chipset resource allocation, the system may detect less than 8
GB system memory when you installed four 2 GB DDR2 memory modules.
If you install four 1GB memory modules, the system may only recognize
less than 3 GB because the address space is reserved for other critical
functions. This limitation appears on Windows
®
XP 32-bit operation
system which does not support Physical Address Extension (PAE).
If you install Windows
®
XP 32-bit operation system, a total memory of
less than 3GB is recommended.
R
P5NSLI 240-pin DDR2 DIMM Sockets
DIMM_A2
DIMM_A1
DIMM_B2
DIMM_B1
112 pins
128 pins