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Three green DDR3 ECC RDIMM modules in antistatic bags

A-Tech

A-Tech 12GB (3x4GB) DDR3 1333 ECC RDIMM memory upgrade

SKU CH-CPK7-Q2BR6

12 GB DDR3 1333 ECC RDIMM kit for Apple Mac Pro Mid 2010 and Mid 2012 Xeon models

  • Total capacity12 GB (3 × 4 GB)
  • Rated speedDDR3 1333 (PC3 10600)
  • ChipsetMajor Brand Chipset
  • Rated voltage1.5 V
  • Buffer typeRegistered
  • Compatible systemsApple Mac Systems
  • 12 GB kit for Apple Mac Pro Mid 2010 and 2012
  • DDR3 1333 MHz PC3-10600 ECC registered RDIMM
  • 240-pin form factor with major-brand chips
  • 50 V operation for stable server workloads
  • Lifetime warranty with US-based technical support

What this kit upgrades

This 12 GB kit contains three 4 GB DDR3 1333 registered ECC modules built for the Mac Pro 5,1. It targets owners of the Mid 2010 or Mid 2012 towers who need more memory for virtual machines, rendering or large datasets. The 240-pin RDIMM form factor matches the factory memory slots exactly.

DDR3 1333 registered ECC limits

The Mac Pro 5,1 memory controller runs at 1333 MHz and requires registered ECC DIMMs; unbuffered or non-ECC modules will not be recognised. Each slot accepts a 2Rx4 organisation at 1.50 V, so the three-module kit fills three of the four available channels without exceeding the platform electrical specification.

Compatibility is defined by model ID

Only systems reporting MacPro5,1 (order numbers MD771LL/A, EMC 2314-2 or 2629) with the listed Xeon processors — 2.4, 2.66, 2.93, 3.06 or 3.33 GHz variants — are validated. Machines with different model identifiers, single-core configurations or non-Xeon CPUs cannot use this memory.

How it compares

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

Price $64.99
Cheaper than about 74% of the 21,161 comparable items (median $397.99).
Total capacity 12 GB (3 × 4 GB)
Lower than about 75% of the 20,941 comparable items (median 32 GB).
Price per GB $5.42 per GB
Cheaper than about 71% 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 capacity12 GB (3 × 4 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 choose the 12GB kit or look for a different capacity for my Mac Pro?

This kit provides 12GB total capacity using three 4GB modules, designed for Mac Pro models from 2010 and 2012 with Xeon processors such as the 2.4GHz E5645 or 3.33GHz W3680.

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

The modules run at DDR3 1333MHz (PC3-10600), matching the native memory bus speed of the supported Mac Pro systems for full performance without downclocking.

Is the 240-pin RDIMM interface the correct standard for my Mac Pro, and does it limit capacity?

Yes, these are 240-pin DDR3 RDIMMs with ECC registered operation, the exact form factor required by the Mac Pro 5,1; the three-module kit fills three slots for 12GB total.

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