Asus P5GD2 - Manual (Page 34)

2 - 1 2 2 - 1 2 2 - 1 2 2 - 1 2 2 - 1 2 C h a p t e r 2 : H a r d w a r e i n f o r m a t i o n C h a p t e r 2 : H a r d w a r e i n f o r m a t i o n C h a p t e r 2 : H a r d w a r e i n f o r m a t i o n C h a p t e r 2 : H a r d w a r e i n f o r m a t i o n C h a p t e r 2 : H a r d w a r e i n f o r m a t i o n
2.4 System memory
2.4.1 2.4.1 2.4.1 2.4.1 2.4.1 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:
2.4.2 2.4.2 2.4.2 2.4.2 2.4.2 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 for better performance
(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 DDR2-533 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.
C h a n n e l C h a n n e l C h a n n e l C h a n n e l C h a n n e l S o c k e t s S o c k e t s S o c k e t s S o c k e t s S o c k e t s
Channel A DIMM_A1 and DIMM_A1
Channel B DIMM_B1 and DIMM_B2
P5GD2
R
P5GD2 184-Pin DDR DIMM sockets
DIMM_A1 DIMM_A2 DIMM_B1 DIMM_B2