Comment Re:Really looking forward to seeing (Score 1) 16
Likewise with PCI 4.0 cards in a PCI 3.0 motherboard:
[ 0.768734] [ T1] pci 0000:43:00.0: 126.016 Gb/s available PCIe bandwidth, limited by 8.0 GT/s PCIe x16 link at 0000:40:03.1 (capable of 252.048 Gb/s with 16.0 GT/s PCIe x16 link)
or in a physically-x16-really-x4 slot:
[ 0.777737][ T1] pci 0000:09:00.0: 31.504 Gb/s available PCIe bandwidth, limited by 8.0 GT/s PCIe x4 link at 0000:00:03.1 (capable of 126.024 Gb/s with 16.0 GT/s PCIe x8 link)
The second card has same problem as yours, when in a real x16 slot it'd use only 8 lanes despite physically having the connectors.