User Manual N11
Connectors and interfaces
Industrial PC
www.noax.com
Page 54 of 120
3085-US-2.4
9.12
PCIe (PCI Express) description
Danger
PCIe cards must only be connected to the mainboard using adapter boards (back
planes). Slots directly on the mainboard have a special assignment. Connecting cards
directly could cause irreversible damage to the connected card or the mainboard.
Depending on the chosen equipment, the Industrial PC has up to two slots for PCIe
cards.
Into the left
“
PCIe x8
”
slot (Slot 1)
x1 and x4 cards can also be inserted as well as x8
cards, even if they do not completely fill up the x8 slot.
Into the right
“
PCIe x16
”
slot (Slot 2)
x1, x4, and x8 cards can also be inserted as
well as x16 cards, even if they do not completely fill up the x16 slot.
Both PCIe slots have 4 electrical lanes each.
D
PCIe x8 slot: 4 electrical lanes
D
PCIe x16 slot: 4 electrical lanes
PCIe cards that are operated with fewer lanes than they actually have can be operated
with one lane according to the specification, e.g., x16 card with x1 configuration.
However, if several lanes are used, compatibility depends on the cards, e.g., x16 card
with x4 configuration. In practice, however, the majority of PCIe cards are compatible
with x2 and x4 configurations.
