Chapter 7
Removing and Replacing Components
Hot-Plug PCI-X
179
NOTE If the system is rebooted in the new configuration, then both cards will initialize to run at 33 MHz.
This is because the system firmware can only change the bus capability from 66 MHz down to 33
MHz.
2. If you have a 33 MHz card in slot 3, and you hot-plug insert a 66 Mhz card into slot 4, it will work but the new card
will run at 33 MHz. This also applies to slots 5 and 6, as they are shared (both use a common bus).
3. If your unit is powered down and you insert a 33 MHz card into slot 4 (that shares a 66 MHz card in slot 3), then both
cards will run at 33 MHz when the unit is powered up. This also applies to slots 5 and 6, as they are shared (both use
a common bus).
• Slots 7 and 8 are single slots. The maximum capability of each slot is PCI-X 133MH. Only slots 7 and 8 will allow 133
Mhz, PCI-X cards to run at full speed. These two slots are not limited by bus mode frequency related incompatibilities.
Table 7-6 PCI-X Card vs. Slot Frequency/Bus Mode Compatibility for Shared Slots
a
a. NOTE: The conditions described in this table apply only to shared slots (slots 3,4-bus 2
and 5,6-bus 3). Slots 7 and 8 are not shared slots.
Current PCI Bus
Mode and
Frequency for the
Shared Slot
Cards to be installed
PCI 33 PCI 66 PCI-X 66 PCI-X 133
PCI 33 MHz
Compatible
b
b. Compatible: card is accepted and runs at frequency shown.
Compatible
(2nd note)
New card
running at PCI
33
Compatible
(2nd note)
New card
running at PCI
33
Compatible
(2nd note)
New card
running at PCI
33
PCI 66 MHz Incompatible-F
requency
c
c. Incompatible-Frequency: card is rejected. The new card will not initialized and will power
down due to frequency mismatch.
Compatible
(2nd note)
Compatible
(2nd note)
New card
running at PCI
66
Compatible
(2nd note)
New card
running at PCI
66
PCI-X 66 MHz Incompatible-F
requency
(3rd note)
Incompatible-B
us
d
d. Incompatible-Bus: Card is rejected. The new card will not initialize and will power down
due to bus mode mismatch.
Compatible
(2nd note)
Compatible
(2nd note)
New card
running at
PCI-X 66
PCI-X 133 MHz
e
e. Maximum bus mode and frequency supported on shared slots is PCI-X 66 MHz.
Incompatible-F
requency
(3rd note)
Incompatible-Fr
equency
(3rd note)
Compatible
(2nd note)
New card
Compatible
(2nd note)
New card
running at
PCI-X 66
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