What's the bandwidth and form factor for PCIe x1 x4 x8 and x16?

pcie 1 slot   Dan pcie 40 in pcie 30 slot

Two types of PCIe slot on an Asus H81M-K motherboard Various slots on a computer motherboard, from top to bottom: PCI Express x4; PCI Express x16; PCI Express

SYONCON PCIe Multiplier, PCIe Splitter 1 to 4 PCI-Express 16X Slots Riser Card, PCI-E 1X to External 4 USB Adapter for BTC Miner Machine GPU Mining · Picture shown identifies the PCIPCIe slot position on a 6-slots ATX server board From left-hand side are PCIX-64 slot-1, PCIX-64 slot-2, PCI-32 slot-3,

kast met slot goedkoop 1 additional PCI-Express x1 slot is needed  For example, an x1 slot can have only one transfer lane used by the x1 card inserted into the slot; x2, x4, x8, and x16 slots are also available