Compaq AlphaServer GS60E Service Manual page 21

All memory modules for the AlphaServer GS60E have SIMMs (single inline
memory modules). DRAMs are mounted on small cards that are fixed to the
larger memory module by spring-held mounting clips that grip both sides of the
SIMM. Figure 1-4 shows:
–
The array of SIMMS in an MS7CC–EA (1-Gbyte) memory module.
—
Memory data interface (MDI) gate arrays that provide the data interface
between the TLSB bus and the DRAM arrays. The MDIs contain data
buffers, ECC checking logic, self-test data generation and checking logic,
and control and status registers (CSRs).
˜
The control address interface (CTL) gate array that provides the interface
to the TLSB, controls DRAM timing and refresh, runs memory self-test,
and contains TLSB and memory-specific registers.
™
The DC-to-DC converter.
All types of SIMMs for all the memory modules available for AlphaServer
GS60E systems are field-replaceable. Section 3.6 describes how to isolate a
problem SIMM. When you replace a SIMM, you must be sure that the type of
SIMM matches the module for which it is designed, as detailed in Table 1-1.
Table 1-1 Memory Modules and Related SIMMs
Memory (Size)
MS7CC–EA (1 GB)
MS7CC–FA (2 GB)
MS7CC–GA (4 GB)
Motherboard
Part Number SIMM Part Number
EA2035-AA 54-21726-01 (32 MB)
EA2036-AA 54-21718-01 (64 MB)
EA2037-AA 54-24723-01 (128 MB)
Number
of SIMMs
32
36
36
Introduction 1-9