Per NVMe M.2 M-Key 2242 2260 2280 Scheda di Espansione SSD PCI 4.0 x16 4-Bay 32Gbps
(a) The motherboard supports PCI-E split function, which can set PCI-E X4X4X4 or 4X4 mode;. Server motherboards, X299, X399 motherboards many of them have split function.