MSI MAG Z790 TOMAHAWK MAX WIFI motherboard review

Can I put a PCI-E x16 gpu in a PCI-E x16 slot? can i put pcie x4 in x16 slot Expansion slots: 1x PCIe x16, 1x PCIe x4, 1x PCIe x1 Video ports: 1x DisplayPort 1x HDMI USB: Up to 1x USB Gen2x2 candy bar slot 1 PCIe x16 slot; 4 SATA3, 2 x ; Graphics Output Options: HDMI & Display ; 1 Rear USB Gen2x2 Type-C, 1 Rear USB Gen2 Type-A

can you use ddr4 in ddr5 slot PCIe x4: These have four PCIe lanes, and they also can fit into a x16 slot Often used for single NVMe SSD expansion cards, they are