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Eight green DDR4 LRDIMM modules with gold contacts in a row

A-Tech

A-Tech 512GB (8x64GB) DDR4 2666 ECC LRDIMM memory upgrade

SKU CH-ZV50-JZ6S0

Eight 64 GB DDR4 2666 LRDIMM modules add 512 GB of ECC memory to the 2019 Apple Mac Pro tower or rack model

  • Total capacity512 GB (8 × 64 GB)
  • Rated speedDDR4 2666 (PC4 21300)
  • ChipsetMajor Brand Chipset
  • Rated voltage1.2 V
  • Buffer typeLoad Reduced
  • Compatible systemsApple Mac Systems
  • 512 GB total capacity from eight 64 GB modules for heavy multitasking
  • DDR4 2666 MHz speed rated PC4-21300 for fast data transfer
  • ECC load-reduced design protects data integrity under sustained workloads
  • 288-pin LRDIMM form factor built for Apple Mac Pro 2019 systems
  • 20 V operation reduces power draw while maintaining stability

512GB DDR4 ECC LRDIMM kit for Mac Pro 2019

This 512GB kit contains eight 64GB DDR4 2666 ECC LRDIMM modules built for the Apple Mac Pro (2019, 8-Core) in both tower and rack configurations. It targets professionals who need maximum memory capacity for virtualisation, large datasets or multi-application workflows on Xeon W-3223 platforms.

Replaces lower-capacity

The 8x64GB population fills all DIMM slots on the MacPro7,1, so the upgrade is worthwhile when your current total is below 512GB and workloads hit memory pressure. If you already run 512GB of compatible LRDIMMs, adding this kit provides no further capacity headroom.

DDR4 2666 LRDIMM electrical and mechanical limits

Modules operate at 1.20V with a 288-pin LRDIMM form factor and 4Rx4 organisation, which the Mac Pro memory controller must support. The load-reduced buffer reduces electrical load on the bus but does not increase the 2666 MT/s data rate beyond the platform specification.

How it compares

Measured against everything we stock in Model-Specific Memory Upgrades, at today’s prices. Recalculated every night.

Price $1,584.99
Pricier than about 65% of the 21,161 comparable items (median $397.99).
Total capacity 512 GB (8 × 64 GB)
Higher than about 90% of the 20,941 comparable items (median 32 GB).
Price per GB $3.10 per GB
Cheaper than about 89% of the 20,941 comparable items (median $8.19 per GB).

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Specifications

Product
Brand nameA-Tech
Product lineA-Tech DDR4 Apple Mac RAM Memory Upgrades
Total capacity512 GB (8 × 64 GB)
Performance
Rated speedDDR4 2666 (PC4 21300)
Processor
ChipsetMajor Brand Chipset
Memory
ECC supportYes
Buffer typeLoad Reduced
Power
Rated voltage1.2 V
Compatibility
Compatible systemsApple Mac Systems

Questions about this item

Will the 8 x 64 GB LRDIMM kit occupy all 12 slots in the Mac Pro (2019) tower?

The kit provides eight 288‑pin modules; the Mac Pro (2019) has twelve DIMM slots, so four slots remain free for future expansion.

What is the correct order for installing the eight modules in the Mac Pro (2019) memory bays?

Fill the slots in the sequence shown in Apple's official guide — typically slots 1, 2, 3, 4, 5, 6, 7, 8 — and press each module straight down until the ejectors click.

How can I tell if one of the 64 GB modules needs replacement years from now?

Watch for corrected ECC error counts rising in macOS Console or repeated kernel panics; a failing module will show persistent errors while the others stay clean.

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