Performance Balancing; Removing The Expansion Slot Cover - HP ProLiant ML370 Generation 4 Reference And Troubleshooting Manual

Slot
3
4
5
6
* x8 PCI Express cards are supported, but will run at x4 speeds.

Performance balancing

Balancing is the paired arrangement of expansion boards for optimal
performance based on the bus architecture of the expansion slots. When
populating boards on a shared bus, be sure that both boards operate at the same
speed (two PCI boards or two PCI-X boards). If boards with different speeds are
used, the bus performs at the speed of the slowest board. Performance balancing
is not necessary with PCI Express slots.
To balance expansion board performance, populate slots across different buses
before populating two slots on the same bus.
Slot Number
1
2
3
4

Removing the expansion slot cover

1. Power down the server ("Powering down the server" on page 27).
Expansion
card type
PCI-X
PCI-X
PCI Express *
PCI Express *
NOTE: The population order is only a recommendation. Expansion
boards can reside in any slot.
Population Order
1
3
2
4
NOTE: The operating system detects expansion devices in the
following order: 1-2-3-4-5-6.
Hardware options installation
Connector Capable speed
64-bit, 3.3-volt 100-MHz
64-bit, 3.3-volt 100-MHz
x8 x4
x8 x4
PCI-X Bus Sharing
Slots 1 and 2 shared PCI-X bus
Slots 1 and 2 shared PCI-X bus
Slots 3 and 4 shared PCI-X bus
Slots 3 and 4 shared PCI-X bus
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