NVMe is a technology. M2 is a connector type.
If you open one of those drives you’ll find NVMe tech. You won’t find M2 connectors.
this post was submitted on 29 Nov 2023
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There are some Optane drives with m.2 interface like P1600X. Optane may not beat bandwidth records, but their low latency makes them ideal for when you have to do lots of smaller read/write operations like when using databases.
Depending on the board, you may have a connection available natively. It's not uncommon for supermicro to have slimSAS connectors on their enterprise boards that support a PCIE mode.
You can also purchase simple (passive) interface adapters for M.2 ports that convert to a number of connectors, such as slimSAS, OcuLink, or Mini-SAS HD ports that can carry a PCIE signal--which are used for U.2 drives through cables with the correct connectors on each end.
....Or you can do the easy thing and just get a different M.2 NVME drive?