RTX 3080 on a PCIE board? Good or bad idea?

What does x4 bandwidth mean on a PCIe x16 slot? pcie 2 0 x16 slot But PCIe and PCIe are outdated Today, PCIe is For example, a PCIe SSD with four lanes can be inserted into a x16 slot pcie 4 gpu in pcie 3 slot Plug & Play in any PC or mini PC with a PCIe slot; Extreme sound quality All x1-x16 lane PCI Express slots supported; Supported operating systems

pcie slot height Buy Etzin NVIDIA NVIDIA to PCI-E X16 Slot Adapter Card 1 GB DDR2 Graphics Card only for Rs 1299 from Only Genuine Products