Will PCIe x1 x4 cards work in x16 slot?

Will PCIe x1 x4 cards work in x16 slot? pcie x1 in x16 slot Description This PCIe x1 to PCIe x16 Slot Extension adapter provides enhanced compatibility between motherboards and a variety of PCI Express expansion cards, pcieslot A PCIe x1 slot has one lane and can move data at one bit per cycle Most GPUs require a PCIe x16 slot to operate at their full potential

pcieslot Not true You can actually use a PCIe x1 card in a x16 slot While not applicable in this particular case (what with the mini-ITX

pcie 40 gpu in 30 slot The PCIe x1 slot is the smallest PCI Express slot and has the lowest throughput compared to larger PCIe slots such as the PCIe x16 slot  The PCI Express x1 to x16 adapter accommodates low profile x2, x4, x8, x12 or x16 PCI Express cards, eliminating the cost and hassle of upgrading a PCIe card or