ASRock Rack B550D4 Memory Upgrade

The ASRock Rack B550D4 supports 4 slots of upgradable memory, with a maximum capacity of 128GB. It is compatible with our modules for high-performance operation. NEMIX RAM memory upgrades for the ASRock Rack B550D4 are backed by a lifetime replacement warranty.
Our modules are manufactured using top-tier components from leading
suppliers such as Samsung, Micron, and Hynix, ensuring compliance with
industry standards like JEDEC and CE requirements.

System Memory:
4 DIMM slots, Supports DDR4-3200 ECC*/non-ECC UDIMM (For AMD Ryzen Desktop Processors with Radeon Graphics, ECC support is only with Processors with PRO technologies.) with a Maximum capacity of 128GB of memory upgrades. You can install the maximum 128GB memory using four NEMIX RAM 32GB UDIMM memory modules.
The ASRock Rack B550D4-4L supports: AMD Ryzen™ 5000 and 4000 G-Series Desktop Processors with Radeon™ Graphics, AMD Ryzen™ 5000 and 3000 Series Desktop Processors, AMD Ryzen™ PRO 5000, 4000 and 3000* Series Desktop Processors (* Not compatible with AMD Ryzen™ PRO 3000 Series Desktop Processors with Radeon™ Graphics)