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Figure 3-6 RXE-100 PCI-X expansion board (six slots)
For each of the three buses (A, B, C), one of the following can be installed:
One 64-bit 3.3 V PCI-X 133 MHz adapter (in the odd-numbered slot), running
at up to 133 MHz
Two 64-bit 3.3 V PCI-X 133 MHz adapters running at up to 100 MHz
Two 64-bit 3.3 V PCI or PCI-X, 33 or 66 MHz adapters
Note: The PCI slots support 3.3 V adapters only. 5.0 V adapters are not
supported.
Like the x450, these slots can accept adapters rated at speeds ranging from 33
MHz to 133 MHz. When deciding which adapters to put in which slots, consider
the following:
Each adapter has a maximum rated speed. Each bus also has a maximum
rated speed.
Installed adapters will operate at the slowest of three speeds:
– The rated speed of adapter 1 in the bus
– The rated speed of adapter 2 in the bus
– The rated speed of the bus
32-bit adapters can be installed in any of the slots and will run in 32-bit mode.
32-bit and 64-bit adapters can coexist in 64-bit slots in the same bus. The
32-bit adapters will run in 32-bit mode, and the 64-bit adapters will run in
64-bit mode.
IBM ^ xSeries 450 Planning and Installation Guide
52
RXE Expansion Port
Bus:
C
B
Slot:
6
5
4
A
3
2
1
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