Help Struggling to understand PCI versions and speeds


theun

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18 minutes ago, theun said:

Ta @tjb_altf4, Is this the same case for example using a Card that is PCIe 2.0 8x  in a PCIe 3.0 4x slot? as it will only be connecting with half of the lanes?

Yes. Half the lanes, and it will connect at PCIe 2.0 speeds (to match the card).

For a typical HBA using HDDs ( up to 8 ), you probably wouldn't notice much of a difference, but you can see some real world testing below to get an idea.

 

 

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