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Eight green DDR3 RDIMM sticks with gold contacts and silver heat spreaders

A-Tech

A-Tech 64GB (8x8GB) DDR3 1333 ECC RDIMM Mac Pro 12-Core 2010/2012 memory upgrade

SKU CH-502Z-9TW11

Eight 8 GB DDR3 1333 ECC registered DIMMs add 64 GB to 12-core Mac Pro towers from 2010 and 2012

  • Total capacity64 GB (8 × 8 GB)
  • Rated speedDDR3 1333 (PC3 10600)
  • ChipsetMajor Brand Chipset
  • Rated voltage1.5 V
  • Buffer typeRegistered
  • Compatible systemsApple Mac Systems
  • 64GB kit expands multitasking headroom for demanding workloads
  • DDR3 1333 MHz registered ECC protects data integrity
  • Eight 8GB modules fill all slots on compatible Mac Pro
  • Qualified for 12-core 2010 and 2012 models
  • Lifetime warranty with US-based technical support included

Mac Pro 12-Core 2010/2012 memory kit

This 64GB kit contains eight 8GB DDR3 1333 RDIMM modules built for the Apple Mac Pro 12-Core models from 2010 and 2012. It uses ECC registered chips at 1.50V and fits the 240-pin slots in those towers. The kit matches Apple order number MD771LL/A and model ID MacPro5,1.

DDR3 1333 registered ECC limits

DDR3 1333 (PC3-10600) registered ECC memory tops out at 1333 MHz on these platforms and cannot run faster without instability. The 240-pin RDIMM form factor is physically incompatible with UDIMM or SO-DIMM slots. Eight modules fill every slot on the 12-Core Mac Pro, leaving no room for further expansion.

2Rx4 rank configuration decides fit

Each 8GB module uses a 2Rx4 organisation that the Mac Pro 12-Core memory controller requires for full 64GB operation. Other rank layouts such as 1Rx4 or 2Rx8 will not be recognised at this capacity. Buyers needing a different rank structure must choose another kit.

How it compares

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

Price $238.99
Cheaper than about 57% of the 21,161 comparable items (median $397.99).
Total capacity 64 GB (8 × 8 GB)
Higher than about 60% of the 20,941 comparable items (median 32 GB).
Price per GB $3.73 per GB
Cheaper than about 86% of the 20,941 comparable items (median $8.19 per GB).

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Specifications

Product
Brand nameA-Tech
Product lineA-Tech DDR3 Apple Mac RAM Memory Upgrades
Total capacity64 GB (8 × 8 GB)
Performance
Rated speedDDR3 1333 (PC3 10600)
Processor
ChipsetMajor Brand Chipset
Memory
ECC supportYes
Buffer typeRegistered
Power
Rated voltage1.5 V
Compatibility
Compatible systemsApple Mac Systems

Questions about this item

Should I pick the 8 x 8 GB kit or a different capacity for my Mac Pro?

This kit delivers 64 GB across eight 8 GB modules, filling all slots on the 12-Core Mac Pro (Mid 2010 or Mid 2012) for the maximum supported memory.

What does the 1333 MHz rating mean once the memory is installed in the Mac Pro?

The modules run at DDR3 1333 (PC3-10600), matching the native memory bus speed of the 2.4 GHz, 2.66 GHz, 2.93 GHz and 3.06 GHz Xeon processors listed for these systems.

Will the 240-pin RDIMM interface work in my Mac Pro and what does it cap?

Yes — the 240-pin ECC Registered RDIMM form factor is the exact type required by the Mac Pro 5,1 (A1289 EMC 2314-2 / 2629), and the DDR3 1333 bus caps the peak transfer rate at PC3-10600.

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