Memory Modules: Description/Adding Memory; Warnings And Cautions; Module Features - Intel AC450NX Product Manual

19 Memory Modules: Description/Adding
Memory
This chapter describes the memory module and tells how to populate the DIMM sockets on the
memory module.

Warnings and Cautions

Only a qualified service technician is authorized to remove the server covers and to access any
of the components inside the server. Before removing the covers, see "Safety Guidelines" on
page 115.

Module Features

Memory module:
•
Up to 4 GB of ECC memory using sixteen 72-bit dual inline memory modules (DIMMs)
•
60 ns and 50 ns, 3.3 V, buffered EDO DRAM
•
Four-way interleaving
•
A minimum configuration of 128 MB using four 32 MB DIMMs
•
Supports buffered DIMMs with capacities of 32, 64, and 256 MB
•
Provides server management data with an onboard EEPROM, including thermal monitoring,
FRU information, and presence-detect bit access
•
Can act as a memory terminator module when not populated with DIMMs
You must install two high-capacity DRAM memory modules and one of them must be populated
with DIMMs.
ECC memory detects and corrects single-bit errors from DRAM in real time, allowing your server
to function normally despite data transmission errors. ECC detects all double-bit errors but does
not correct them; it also detects, but does not correct, three-bit and four-bit adjacent errors in a
DRAM nibble. Single-bit errors are reported down to the exact bit within DIMM. Multiple-bit
errors are reported down to an interleave which corresponds to a single DIMM.
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