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2019 Mac Pro: OWC Accelsior 4M2 PCIe SSD
Related: 2019 Mac Pro, bandwidth, Mac Pro, Macs, memory, memory bandwidth, Other World Computing, OWC Accelsior 4M2 PCIe SSD, OWC Accelsior 8M2 PCIe SSD, PCIe SSD, RAID, SSD
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UPDATE: see also the 8-blade Accelsior 8M2 PCIe SSD, with twice the speed and up to 64TB capacity.
The OWC Accelsior 4M2 PCIe SSD has 4 slots for M.2 NVMe SSD modules. It is shipped with SoftRAID to combine those 4 modules into a single volume. As tested here, it was configured as a single RAID-0 stripe volume. It is also possible to configure it as 4 individual volumes (one per blade), or dual 2-blade volumes, or a RAID-4, and a variety of other possibilities, all courtesy of SoftRAID. Super fast and easy no matter what.
Results: speed across entire capacity, large I/O sizes
OMG! This performance obliterates any SSD ever tested by MPG, doubling previously top-end speeds. Not enough? Two cards can be set up as an 8-blade RAID with speeds that should hit 10-12 gigabytes per seconds, which is fairly pointless, but very cool.
Next, see the speed versus transfer size graph, also impressive.
The 16TB model (June 2020) delivers similar performance. This runs rings around a hard drive at about 25 times faster across the entire capacity.
Results: speed vs I/O size
Bat shit fast! Speed with only 256 KiB transfers already approaches maximum speed of any Apple internal SD and by 512 KiB, the OWC Mercury Accelsior 4M2 trounces the very fastest Apple internal SSD at its best. The Accelsior only gets faster from there!
Below, the 16TB model (June 2020) delivers similar performance.