Model 90 Memory Riser Card

Model 90 Memory Riser Card

Purpose:
provides a redesigned memory riser for 8590 systems to eliminate parity errors caused by dissimilar memory SIMMs.

Machines affected:
all 8590 systems

Physical check:
inspect the memory riser for FRU p/n 33F4905

Detail:
If memory riser card FRU p/n 33F4905 is populated with mixed SIMMs and any of the following errors occur:

then replace both memory risers with FRU p/n 81F8823.