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Service Reference Guide, dc7600 390742-001 F–1
F
Memory
The dc7600 series computers with Intel-based processors come with double data rate 2
synchronous dynamic random access memory (DDR2-SDRAM) dual inline memory modules
(DIMMs).
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CAUTION: DDR and DDR2 memory modules are not interchangeable.
DDR2-SDRAM DIMMs
The memory sockets on the system board can be populated with up to four industry-standard
DIMMs. These memory module sockets are populated with at least one preinstalled memory
module. To achieve the maximum memory support, you can populate the system board with up
to 4GB of memory configured in a high-performing dual channel mode.
For proper system operation, the DDR2-SDRAM DIMMs must be:
■ industry-standard 240-pin
■ unbuffered PC2 4200 533 MHz-compliant or PC2 5300 667 MHz-compliant
■ 1.8volt DDR2-SDRAM DIMMs
The DDR2-SDRAM DIMMs must also:
■ support CAS latency 4 (CL = 4) for PC2 4200 533 MHz or CAS latency 5 (CL = 5) for PC2
5300 667 MHz
■ contain the mandatory JEDEC SPD information
In addition, the computer supports:
■ 256Mbit, 512Mbit, AND 1 Gbit non-ECC memory technologies (all three Mbit technologies
may be used with each other with no performance degradation)
■ single-sided and double-sided DIMMS
■ DIMMs constructed with x8 and x16 DDR devices; DIMMs constructed with x4 SDRAM
are not supported
DIMM Sockets
There are four DIMM sockets on the system board, with two sockets per channel. The sockets are
labeled XMM1, XMM2, XMM3, and XMM4. Sockets XMM1 and XMM2 operate in memory
channel A. Sockets XMM3 and XMM4 operate in memory channel B.