SG0-001 · Question #277
You are installing a x16 PCI-E HBA into a server and notice that you only have a x8 slot available. What is the impact of this action?
The correct answer is C. The HBA cannot be installed into a x8 slot.. A x16 PCI-E HBA cannot be physically installed into a x8 PCI-E slot because the connector length differs, preventing proper seating.
Question
You are installing a x16 PCI-E HBA into a server and notice that you only have a x8 slot available. What is the impact of this action?
Options
- AThe HBA will negotiate and only use x8 lanes.
- BThe slot must be reconfigured for x16 support.
- CThe HBA cannot be installed into a x8 slot.
- DThe slot will negotiate to support the x16 HBA.
How the community answered
(48 responses)- A2% (1)
- C94% (45)
- D4% (2)
Why each option
A x16 PCI-E HBA cannot be physically installed into a x8 PCI-E slot because the connector length differs, preventing proper seating.
The HBA cannot be physically installed, so negotiation cannot occur.
PCI-E slot physical configurations cannot be reconfigured to support a longer card, only a longer slot can accommodate a shorter card.
A x16 PCI-E card has a longer physical connector than a x8 slot. Unless the x8 slot is an 'open-ended' x16 slot, the physical mismatch prevents the x16 HBA from being inserted and properly seated in the x8 slot.
The slot cannot negotiate for a card that physically cannot be installed into it due to connector size.
Concept tested: PCI-E physical compatibility and slot sizing
Source: https://learn.microsoft.com/en-us/windows-hardware/drivers/gettingstarted/plug-and-play-in-pci-express
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