Memory - Dell Optiplex 755 Technical Manualbook

Dell™ optiplex™ 755 technical guiDe

MEMory

Your computer supports a maximum of 8GB of memory when you use four 2GB DIMMs; however, 32-bit operating systems, such as the
32-bit version of Microsoft
computer require address space in the 4GB range. Any address space reserved for these components cannot be used by computer
memory; therefore, the amount of memory available to the operating system is less than 4GB.
The entire 8GB memory range is available to 64-bit operating systems.
Memory modules should be installed in pairs of matched memory size, speed, and technology. If the memory modules are not installed
in matched pairs, the computer will continue to operate, but with a slight reduction in performance.
DIMM Slots
DIMM Capacities
Minimum Memory
Maximum Memory with 667MHz Speed Memory
Maximum Memory with 800MHz Speed Memory
Configurations:
800MHz Memory Configurations
4GB DDR2 Non-ECC SDRAM, 800MHz,
1
(2 DIMM)
4GB DDR2 Non-ECC SDRAM, 800MHz,
1
(4 DIMM)
2GB DDR2 Non-ECC SDRAM, 800MHz,
(1DIMM)
2GB DDR2 Non-ECC SDRAM, 800MHz,
(2 DIMM)
1GB DDR2 Non-ECC SDRAM, 800MHz,
(1 DIMM)
667MHz Memory Configurations
4GB DDR2 Non-ECC SDRAM, 667MHz,
1
(4 DIMM)
4GB DDR2 Non-ECC SDRAM, 667MHz,
1
(2 DIMM)
3GB DDR2 Non-ECC SDRAM, 667MHz,
(4 DIMM)
2GB DDR2 Non-ECC SDRAM, 667MHz,
(4 DIMM)
2GB DDR2 Non-ECC SDRAM, 667MHz,
(2 DIMM)
1GB DDR2 Non-ECC SDRAM, 667MHz,
(2 DIMM)
1GB DDR2 Non-ECC SDRAM, 667MHz,
(1 DIMM)
512MB DDR2 Non-ECC SDRAM, 667MHz,
(1 DIMM)
The total amount of available memory will be less, depending on actual system configuration.
1
version 1.0
Windows XP, can only use a maximum of 4GB of address space. Moreover, certain components within the
® ®
mt Dt
DDR2 Synch DRAM Non-ECC Memory 667MHz or 800MHz speeds
4 4
Up to 2GB Up to 2GB
512MB 512MB
8GB 8GB
1 1
8GB 8GB
1 1
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sff usff
4 2
Up to 2GB Up to 2GB
512MB 512MB
8GB 4GB
1 1
8GB 4GB
1 1
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✓
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✓
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