Performance Balancing; Expansion Slot Cover - HP ProLiant ML370 Generation 5 User Manual

Slot Expansion
card type
1 PCI Express
2 PCI-X
3 PCI-X
4 PCI Express
5 PCI Express
6 PCI Express
7 PCI Express
8 PCI Express
9 PCI Express

Performance balancing

Balancing is the paired arrangement of PCI-X 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.
The population order is only a recommendation. Expansion boards can reside in any slot.
Slot number
1
2
3
4
5
6
7
8
9

Expansion slot cover

To remove the component:
Power down the server (on page 20).
1.
Connector
x8
64-bit, 3.3-V
64-bit, 3.3-V
x8
x8
x8
x8
x8
x8
Population order PCI-X bus sharing
1 North bridge PCIe link
9 Slots 2 and 3 shared PCI-X bus
8 Slots 2 and 3 shared PCI-X bus
7 South bridge PCIe link
6 South bridge PCIe link
5 North bridge PCIe link
4 North bridge PCIe link
3 North bridge PCIe link
2 North bridge PCIe link
Speed
x4
133-MHz capable
133-MHz capable
x4
x4 (optional x8 when
PCIe Bus Expander is
installed in slot 4)
x4
x4 (optional x8 when
PCIe Bus Expander is
installed in slot 6)
x4
x4 (optional x8 when
PCIe Bus Expander is
installed in slot 8)
Hardware options installation 62