All Intel® Solid-State Drive DC P3600 Series are PCIe NVMe 3.0 x4 devices. However, there are two different form factors.
As we understand, you ordered a 2.5-inch SFF drive instead of the HHHL Add-in card Form Factor (Half-height, Half-length AIC).
In this situation, we advise you to contact the reseller or place of purchase, so you can ask them about possible solutions for this issue (exchange, return, or other).
The SFF drive requires an 8639 connector backplane, and we are not aware of supported adapters or converters that will allow the connection of the SFF DC P3600 to a standard PCIe x4 slot.
Intel® Solid-State Drive DC P3600 Series Form Factors:
– 2.5-inch Form Factor
– AIC Form Factor (Add-in Card)
Single slot x4 connector