Memory Problems; Troubleshooting Memory Problems - Compaq AlphaServer DS20E Reference Manual

8.8

Memory Problems

Table 8–6 Troubleshooting Memory Problems
Symptom
DIMMs ignored by system, or
system unstable. System
hangs or crashes.
DIMMs failing memory power-
up self-test.
DIMMs may not have ECC
bits.
Noticeable performance
degradation. The system may
appear hung or run very
slowly.
8-10 DS20E Reference Guide
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Action
Ensure that each memory bank has identical
DIMMs installed.
Try another pair of DIMMs.
Some third-party DIMMs may not be
compatible with DS20E systems. Ensure
memory DIMMs are qualified.
This could be a result of hard single-bit ECC
errors on a particular DIMM. Check the error
logs for memory errors.
Ensure memory DIMMs are qualified.