Dell PowerEdge SC440 Hardware Owner's Manual  - Page 59

Memory Module Upgrade Kits, Memory Module Installation Guidelines - processor upgrade

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Memory Module Upgrade Kits The system is upgradable to 4 GB by installing combinations of 512-MB and 1-GB 533-MHz or 667-MHz unbuffered ECC DDR II single or dual-rank memory modules. You can purchase memory upgrade kits from Dell. Memory Module Installation Guidelines • If only one memory module is installed, it must be installed in connector DIMM_1. • If only one memory module is installed in connector DIMM_1, its capacity must be 512 MB. • If more than one memory module is installed, the memory modules must be installed in pairs of matched memory size, speed, and technology. • Memory modules must be installed in ordered pairs in connectors DIMM_1 and DIMM_2, and then DIMM_3 and DIMM_4. • If a processor with a slower front-side bus rating than the memory is installed, the memory will operate at the processor's slower front-side bus speed. NOTICE: If you remove your original memory modules from the system during a memory upgrade, keep them separate from any new memory modules that you may have, even if you purchased the new memory modules from Dell. Use only unregistered or unbuffered ECC DDR II memory modules. Table 3-2 illustrates memory configuration guidelines. It is important to follow the slot installation configurations shown here to achieve maximum memory performance. Table 3-2. Memory Configuration Guidelines Total Memory 512 MB 1 GB 2 GB 2 GB 3 GB 4 GB DIMM_1 512 MB 512 MB 512 MB 1 GB 1 GB 1 GB DIMM_2 none 512 MB 512 MB 1 GB 1 GB 1 GB DIMM_3 none none 512 MB none 512 MB 1 GB DIMM_4 none none 512 MB none 512 MB 1 GB Addressing Memory With 4-GB Configurations (Microsoft® Windows® Operating System Only) Your system supports a maximum of 4 GB of memory using four 1-GB memory modules. Current operating systems can use a maximum of 4 GB of address space; however, the amount of memory available to the operating system is slightly less than 4 GB. NOTE: Depending on the type of PCI/PCIe expansion cards that are installed in your system, your system may only support a maximum of 3.4 GB of memory or less. Installing System Components 59

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Installing System Components
59
Memory Module Upgrade Kits
The system is upgradable to 4 GB by installing combinations of 512-MB and 1-GB 533-MHz or 667-MHz
unbuffered ECC DDR II single or dual-rank memory modules. You can purchase memory upgrade kits
from Dell.
Memory Module Installation Guidelines
•
If only one memory module is installed, it must be installed in connector DIMM_1.
•
If only one memory module is installed in connector DIMM_1, its capacity must be 512 MB.
•
If more than one memory module is installed, the memory modules must be installed in pairs of
matched memory size, speed, and technology.
•
Memory modules must be installed in ordered pairs in connectors DIMM_1 and DIMM_2, and then
DIMM_3 and DIMM_4.
•
If a processor with a slower front-side bus rating than the memory is installed, the memory will operate
at the processor’s slower front-side bus speed.
NOTICE:
If you remove your original memory modules from the system during a memory upgrade, keep them
separate from any new memory modules that you may have, even if you purchased the new memory modules from
Dell. Use only unregistered or unbuffered ECC DDR II memory modules.
Table 3-2 illustrates memory configuration guidelines. It is important to follow the slot installation
configurations shown here to achieve maximum memory performance.
Addressing Memory With 4-GB Configurations (Microsoft
®
Windows
®
Operating System Only)
Your system supports a maximum of 4 GB of memory using four 1-GB memory modules. Current
operating systems can use a maximum of 4 GB of address space; however, the amount of memory
available to the operating system is slightly less than 4 GB.
NOTE:
Depending on the type of PCI/PCIe expansion cards that are installed in your system, your system may only
support a maximum of 3.4 GB of memory or less.
Table 3-2.
Memory Configuration Guidelines
Total Memory
DIMM_1
DIMM_2
DIMM_3
DIMM_4
512 MB
512 MB
none
none
none
1 GB
512 MB
512 MB
none
none
2 GB
512 MB
512 MB
512 MB
512 MB
2 GB
1 GB
1 GB
none
none
3 GB
1 GB
1 GB
512 MB
512 MB
4 GB
1 GB
1 GB
1 GB
1 GB