PCI Express x16 graphics card in a PCIe x16 slot?

PCIe x4 clarification can i put pcie x4 in x16 slot According to PCIE Expresscard , a x1 card can be inserted into the x4, x8, and x16 connectors 15 This is referred to as up candy burst pg slot PCIe x4 devices are compatible with larger PCIe slots such as x8 and x16, and can be installed in these slots as well However, the bandwidth of the device is

can you use a pcie 40 nvme in a 30 slot A GTX 780R9 290 for example may suffer a performance hit but an R7 260GTX 750 may not The PCIe slots are rated as they are because of