80mm is correct. The data is often entered by employees who have no idea about the articles (or IT).

The Crucial P3 SSD (1000GB, M.2 2280) generally does not require a radiator for office use. M.2 SSDs like the Crucial P3 are designed to operate in normal temperature conditions and do not generate enough heat to require additional cooling for standard use.

Unfortunately, I have no idea about that.

It is a PCIe NVME SSD, which is only available as M key. B key is only for SATA, which is practically no longer available for modern SSDs.

My Crucial P3 1tb only has chips installed on one side.

simple