Hp z640 NVMe PCIe Crucial card on PCIe expansion car

In which PCIe slot did you drop the to PCIe x4 card? Unless you dropped it in the PCIEX16 slot (The PCIEX16 slot conforms to PCI Express

2 supports both SATA and PCIe, an module may only be inserted in either one of the two interfaces, so check your motherboard documentation

m2_1 slot Client PCIe NVMe SSDs typically only use the 2280 form factor because its slim design allows it to easily fit into desktop and notebook PCs Enterprise-

m2 vs nvme slot As the subsequent iteration of Gen3, Gen4's data transfer rate is twice that of PCIe Gen 3, enabling PCIe Gen 4 devices to transfer data at a faster speed