PCIe bifurcation
One (x16) PCI BUS → Quad (x4) PCI Devices
Supported by motherboard
bifurcation supported motherboard
(PCIe gen3) https://www.aliexpress.com/item/1005005863871171.html
(PCIe gen4) https://www.amazon.com/dp/B09Z2ZZ844
bifurcation un-supported motherboard
Use expansion card for bifurcation
ex) R720XD Bifurcation - XtremeOwnage.com