PCI Express x16 graphics card in a PCIe x16 slot?

PCI Express x16 graphics card in a PCIe x16 slot? pcie 2 slot Table 1 provides information about the PCIe slots in the 8247-42L system that offers both a single POWER8® processor module or two POWER8 pcie 4 gpu in pcie 3 slot this mobo has three pci-e slots physically 1x16lanes ,2x1line What i found, the x16 slot is supporting only one pcie line according to

pcie 4 gpu in pcie 3 slot pcie slot i use, pcie slot sizes Time Stamp

pcie slot pinout PCI Express to 2 PCI & 2 PCIe Expansion Enclosure System - Full Length - Expansion Bay - External - 4 slot - PCI Express Single Lane The slot format used by both PCI Express and PCI Express is the x16 PCIe slot However, PCI Express slots are subjected to