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 Installing System Options
Dell™PowerEdge™SC430SystemsInstallationandTroubleshootingGuide
Memory
Microprocessor
Expansion Cards
Power Supply
Cooling Fans
System Battery
Memory
Thefourmemorymoduleconnectorsonthesystemboardcanaccommodatefrom256MBto4GBof533-MHz unbuffered ECC DDR II single or dual-rank
memory modules. See FigureA-3 for the location of the four memory module connectors.

Memory Module Upgrade Kits
The system is upgradable to 4 GB by installing combinations of 256-MB, 512-MB, or 1-GB 533-MHz unbuffered ECC DDR II single or dual-rank memory modules.
You can purchase memory upgrade kits from Dell.

Memory Module Installation Guidelines
l If only one memory module is installed, it must be installed in connector DIMM_1.
l If only one memory module is installed in connector DIMM_1, its capacity must be 256 MB.
l If more than one memory module is installed, the memory modules must be installed in pairs of matched memory size, speed, and technology.
l Memory modules must be installed in ordered pairs in connectors DIMM_1 and DIMM_2, and then DIMM_3 and DIMM_4.
l 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.
Table5-1 illustrates memory configuration guidelines. It is important to follow the slot installation configurations shown here to achieve maximum memory
performance.
Table 5-1. Memory Configuration Guidelines

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.
The following components require address space:
NOTE: As shown in FigureA-3, memory slots are not in numeric order on the system board. When installing memory, take care to install it in the proper
slots according to the configuration guidelines in Table5-1. Installing memory in the wrong slots will significantly reduce system performance.
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.

Total Memory

DIMM_1

DIMM_2

DIMM_3

DIMM_4
256 MB
256 MB
none
none
none
512 MB
256 MB
256 MB
none
none
1 GB
256 MB
256 MB
256 MB
256 MB
1 GB
512 MB
512 MB
none
none
1.5 GB
256 MB
256 MB
512 MB
512 MB
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
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.