A-Tech 256GB Kit (8x32GB) DDR4 2666 ECC RDIMM Memory Upgrade for Mac Pro (2019)

256GB DDR4 2666 ECC RDIMM Kit

This kit provides 256GB of DDR4 2666 memory across eight 32GB registered DIMMs. It is built for the 2019 Mac Pro tower and rack models using the MacPro7,1 identifier. The modules run at 1.20V and carry ECC registered functionality for error correction. Professionals expanding memory on these specific workstations will find the capacity and form factor match the factory slots.

Eight-Module Population

Supplying eight 32GB sticks fills all available DIMM slots in the supported Mac Pro configurations. This removes the need to mix module sizes or leave slots empty, letting the memory controller operate in its optimal channel arrangement. The 2Rx4 rank organisation and PC4-21300 rating are factory-matched to the 3.5GHz Xeon W-3223 processor used in the 8-core model.

Registered 288-Pin Build

Each module uses a 288-pin RDIMM form factor with major-brand chips, ensuring mechanical compatibility with the Mac Pro memory tray. Registered buffering reduces electrical load on the memory bus when all eight slots are populated. The kit carries Apple model IDs A1991 and A2304 along with EMC numbers 3203 and 3413 for direct cross-reference. Systems requiring unbuffered UDIMMs or non-ECC memory cannot use this kit.