Asus P5GD2-X - Manual (Page 28)

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1.7 System memory
1.7.1 1.7.1 1.7.1 1.7.1 1.7.1 Overview Overview Overview Overview Overview
The motherboard comes with four 240-pin 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 following figure illustrates the location of the sockets:
1.7.2 1.7.2 1.7.2 1.7.2 1.7.2 Memory Configurations Memory Configurations Memory Configurations Memory Configurations Memory Configurations
You may install 256 MB, 512 MB and 1 GB unbuffered non-ECC DDR2
DIMMs into the DIMM sockets using the memory configurations in this
section.
• For dual-channel configuration, the total size of memory module(s)
installed per channel must be the same
(DIMM_A1+DIMM_B1=DIMM_A2+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 DDR2-533 Qualified Vendors
List on the next page for details.
• Due to chipset resource allocation, the system may detect less than
4 GB of system memory when you installed four 1 GB DDR2 memory
modules.
• Due to chipset limitation, DIMM modules with 128 Mb memory chips
or double-sided x16 memory chips are not supported in this
motherboard.
P5GD2-X
®
P5GD2-X 240-pin DDR DIMM sockets
DIMM_A1 DIMM_A2 DIMM_B1 DIMM_B2
128 pin
1
12 pin
128 pin
1
12 pin