Can PCIe x8 Fit Into x16 Slots?

pcie x1 in x16 slot   Dan pcie2 slot

This PCIe x1 to PCIe x16 Slot Extension adapter provides enhanced compatibility between motherboards and a variety of PCI-Express expansion cards, allowing you

Install a low profile video card into a system with only a x1 PCIe slot • Install x4 or larger PCIe cards into a system with only x1 PCIe slots available  Riser PCIE x1 to x16 GPU performance loss test in any games, compared with PCIE x16 from

frankenslots monster slot PCI-E x16 slots can run other cards As for the board ,you need a motherboard with intel x38,x48 or p45 chipset, but I'm not sure if Or will they only work on a PCI-Ex1 slot? Reason being I am looking at buying an MSI 990FXA-GD80 MoBo I want to use the second card slot