Late 2019 - Mac Pro7,1 (8-core)

Compatible Upgrade for: MacPro7,1 - A1991 - EMC 3203     8 Core 3.5GHz  2019 
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Standard Memory: 32 GB 2666MHz 
Maximum Memory 1 TB
Note:

This system has twelve (12) user-accessible memory slots.
Apple reports that the 8-Core Mac Pro (2019) model supports "2666 MHz" DDR4 ECC memory. More specifically, this model uses 288-pin PC21300 or PC23400 DDR4 RDIMM or LRDIMM memory modules (but you cannot mix RDIMMs and LRDIMMs in the same system).

The following items are also compatible with this product...............................
External Hard Drives Battery SSD Storage Cards
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