NEMIX RAM MR21300-628K1 is a 16GB DDR4-2666 ECC registered memory module for Apple Mac Pro Rack systems identified as MacPro7,1, suited to users upgrading compatible workstations that require 288-pin RDIMM memory.
Recommended For
- Owners of an 8-core Mac Pro (MacPro7,1) who want a modest memory increase: this model runs memory at 2666MHz, matching the module’s rated speed.
- MacPro7,1 owners replacing a 16GB ECC registered DIMM or adding one to an existing RDIMM setup, provided they follow Apple’s supported slot configuration.
- Mac Pro 7,1 owners doing a DIY memory upgrade who prefer a third-party module; 9to5Mac reported successful testing of NEMIX memory in a 2019 Mac Pro.
- IT staff or refurbishers maintaining Mac Pro 7,1 tower or rack systems who need a single 16GB RDIMM replacement and can verify the installed DIMM type and configuration first.
Real-World Use Scenarios
- When a Mac Pro 7,1 runs short of memory during demanding work, adding compatible RAM can give apps and projects more room and may reduce reliance on disk-based virtual memory; it will not speed up work that is limited by the CPU or GPU.
- For video editors handling multicam or large-frame projects, additional memory can provide more headroom for the editing workflow. The practical benefit depends on current memory use and the rest of the system, so check usage before upgrading.
- When running several virtual machines or iOS simulators alongside other work, a larger memory pool can help reduce competition for RAM if those tasks are currently memory-constrained.
- For large datasets or memory-heavy program builds, extra RAM can help keep more working data in physical memory and limit slowdowns from swapping—provided the added capacity is enough for the workload.
- When upgrading or replacing memory in a Mac Pro 7,1, use this module only after checking the installed DIMM type and Apple’s slot-population guidance. The Mac Pro’s 8-core model runs memory at 2666 MHz; other processor models are rated for 2933 MHz, and mixing memory types is not supported.
Spec Summary
| Attribute | Value |
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| Best For | Memory upgrades for compatible Mac Pro Rack 2019/2020 and MacPro7,1 systems that use DDR4 ECC registered memory |
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| Capacity And Module Count | 16GB total in one 16GB module |
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| Memory Type And Configuration | 288-pin DDR4 registered ECC DIMM, dual-rank 2Rx8, without a heat spreader |
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| Speed, Timing And Voltage | 2666 MT/s (PC4-21300), CL19, 1.20V |
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| Model Identifiers | NEMIX RAM Apple Series Server Memory; part number MR21300-628K1; model Apple Compatible Server Memory DDR4 RDIMM |
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