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2.4.22.4.2
2.4.22.4.2
2.4.2
Memory ConfigurationsMemory Configurations
Memory ConfigurationsMemory Configurations
Memory Configurations
You may install 256 MB, 512 MB, and 1 GB unbuffered ECC/non-ECC DDR
DIMMs into the DIMM sockets using the memory configurations in this
section.
•
If you installed four 1 GB memory modules, the system may detect
less than 3 GB of total memory because of address space allocation
for other critical functions. This limitation applies to Windows
®
XP
32-bit version operating system since it does not support Physical
Address Extension (PAE).
• When using only one DDR DIMM module, install it into slot DIMM_B1
only.
• For single-channel memory configuration, start installing the DDR
DIMMs from slot DIMM_B1 or DMM_B2.
•
For dual-channel memory configuration, install the DIMMs in slots
DIMM_B1 and DIMM_A1 (blue slots); install another pair of DIMMs in
slots DIMM_B2 and DIMM_A2 (black slots).
• Always install DIMMs with the same CAS latency. For optimum
results, we recommend that you obtain memory modules from the
same vendor. Refer to the Qualified Vendors List on the next page
for details.
Recommended memory configurationsRecommended memory configurations
Recommended memory configurationsRecommended memory configurations
Recommended memory configurations
SocketsSockets
SocketsSockets
Sockets
ModeMode
ModeMode
Mode
DIMM_A1DIMM_A1
DIMM_A1DIMM_A1
DIMM_A1
DIMM_A2DIMM_A2
DIMM_A2DIMM_A2
DIMM_A2
DIMM_B1DIMM_B1
DIMM_B1DIMM_B1
DIMM_B1
DIMM_B2DIMM_B2
DIMM_B2DIMM_B2
DIMM_B2
Single-channel (1) – – Populated –
Dual-channel* (1) Populated – Populated –
(2) Populated Populated Populated Populated
* Use only identical DDR DIMM pairs.* Use only identical DDR DIMM pairs.
* Use only identical DDR DIMM pairs.* Use only identical DDR DIMM pairs.
* Use only identical DDR DIMM pairs.
* For dual-channel configuration (2), you may:* For dual-channel configuration (2), you may:
* For dual-channel configuration (2), you may:* For dual-channel configuration (2), you may:
* For dual-channel configuration (2), you may:
•
install identical DIMMs in all four sockets
OROR
OROR
OR
•
install identical DIMM pair in DIMM_A1 and DIMM_B1 (blue sockets)