Asus P5GD2-X P5GD2-X User's Manual for English Edition - Page 28

System memory - chipset

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1.7 System memory 1.7.1 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: 112 pin 112 pin P5GD2-X ® 128 pin 128 pin DIMM_A1 DIMM_A2 DIMM_B1 DIMM_B2 P5GD2-X 240-pin DDR DIMM sockets 1.7.2 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. 1-16 Chapter 1: Product introduction

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1-16
1-16
1-16
1-16
1-16
Chapter 1: Product introduction
Chapter 1: Product introduction
Chapter 1: Product introduction
Chapter 1: Product introduction
Chapter 1: Product introduction
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
112 pin
128 pin
112 pin