Old Dual 10Gbe NIC in new PCIe 4.0 Slot

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12 Jul 2021
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London
I have a X520-T2 dual 10Gbe NIC (uses 8xPCIe 2.0 lanes) which has a x8 footprint.
Will this work properly in a PCIe 4.0 x16 slot which states it "supports x4 mode"?
I think this means that the big slot (x16) has 4 PCIe4.0 lanes associated (x4) so that is equivalent to 16 x PCIe 2.0 lanes - more than enought, but will the mismatch in pins make a difference?

Many thanks for guidance!

Regards,
Paul
 
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