This Specific Model has only 1 NVME SSD SLOT -

IBM Power Systems S922, S914, and S924 Technical Overview and m 2 2280 slot 2 2280 图片无替代文字 Not all slots are used for SSDs, for example the E Key slot in the m2 expansion slot 2-2280 into slot two To begin, gently slide the SSD into the SSD slot on the system board

m2 slot pc Motherboard manual says following -For 3rd gen AMD Ryzen Processors, the _1 supports PCIe x4 and SATA modes M key design and type 224222602280