3rd/2nd/1st Gen AMD Ryzen Processors : 1 x M.2_1 socket 3, with M key, type 2242/2260/2280 storage devices support (SATA & PCIE 3.0 x 4 mode)* 1 x M.2_2 socket 3, with M key, type 2242/2260/2280/22110 storage devices support (PCIE 3.0 x 4 mode)*
оба порта полноценные, но есть подвох, видик будет в х8 режиме:
*When the M.2_2 is occupied by M.2 device, PCIe x16_1 will run at x8 mode.