[manav]

PCIe bifurcation - so splitting one of the x16 slots into two x8 or similar.

[metadat]

Worth mentioning - this also cuts the available bandwidth to each card by 50%.

[angoragoats]

While you're technically correct, assuming you're using PCIe 4.0 or higher, the performance difference between x8 and x16 is practically zero.