Dell SC440 owner manual Memory Module Upgrade Kits, Memory Module Installation Guidelines, MB None

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	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

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

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