Apex Storage X21 Carries 21 M.2 SSDs
 

Riser cards carrying multiple M.2-2280 SSDs are nothing new, but Apex Storage went above and beyond with its new X21 board, which can carry up to 21 M.2 drives. The add-in-card is aimed at applications that take advantage of both high storage capacities and performance, including databases as well as machine learning applications. At maximum capacity and utilization, the X21 can hold 168 TB of M.2 storage, running at a peak sequential read/write speed of up to 31 GB/s.

https://www.anandtech.com/show/18769...-up-to-31-gbps