HP AlphaServer GS80, Upgrade Manual

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Upgrades Using B4166 and B4168 CPUs B-3
1. Check the firmware revisions and update, if necessary.
2. Ensure that the color code of the CPU module matches the color code of the slot.
3. Push the retainers on the module latches with your thumbs in the direction
of the arrows and release the latch.
4. Slide the module into the slot guide and gently push it in until the latches
are activated.
5. Close the latches onto the bulkhead and push them in until you hear one or
two clicks. The module is now firmly seated in the slot.
Table B– 1 Comparison of CPUs
CPU Part
Number B-cache
Size Speed
in MHz
Comments
B4125 4 Mbytes 731 The B4125 must operate at this speed and requires the
system clock to run at 9.6 ns.
B4166 4 or 8
Mbytes
1001 The B4166 runs at this speed and uses all its available
B-cache when all CPUs in the system are B4166 or it
is in a system with B4168 CPUs, the clock runs at 9.0
ns, and the CPUs are in a system box with duplicate
tag support of the 8-MB cache. If the system box
duplicate tag supports only 4-MB cache, then only 4 of
the 8 Mbytes of B-cache on the CPU are used.
4 or 8
Mbytes 940 The B4166 runs at this speed and uses all its available
B-cache when all CPUs in the QBB are B4166 or it is
mixed with B4168 CPUs, but the system clock runs at
9.6 ns. If the system box duplicate tag supports only
4-MB cache, then only 4 of the 8 Mbytes of B-cache on
the CPU are used.
Uses 4 of
its 8 Mbyte
B-cache 731 The B4166 runs at this speed and uses 4 Mbytes of its
B-cache when it is in a QBB with a B4125 CPU and
the clock runs at 9.6 ns.
B4168 8 or 16
Mbytes 1224 The B4168 runs at this speed and uses all its available
B-cache when all CPUs in the system are B4168 or
B4166, the clock runs at 9.0 ns, and the CPUs are in a
system box with duplicate tag support of the 16-MB
cache. If the system box duplicate tag supports an 8-
MB cache, then 8 of the 16 Mbytes of B-cache on the
CPU are used.