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Three green DDR3 RDIMM modules with gold contacts, no heat spreaders

A-Tech

A-Tech 48GB Kit (3x16GB) DDR3 1866/1867MHz ECC RDIMM 240-Pin for Mac Pro Late 2013

SKU CH-7D85-40XMB

48 GB kit of three 16 GB DDR3 1866 MHz ECC registered DIMMs for the 2013 Mac Pro cylinder

  • Total capacity48 GB (3 × 16 GB)
  • Rated speedDDR3 1866 (PC3 14900)
  • ChipsetMajor Brand Chipset
  • Rated voltage1.5 V
  • Buffer typeRegistered
  • Compatible systemsApple Mac Systems
  • 48GB total capacity across three 16GB modules for demanding workloads
  • DDR3 1866/1867MHz PC3-14900 speed matching Mac Pro Late 2013 specs
  • ECC Registered RDIMM ensures data integrity for professional applications
  • 240-pin form factor installs directly into Mac Pro cylinder memory slots
  • Validated for MacPro6,1 with Xeon E5-1620v2, E5-1650v2, E5-1680v2, E5-2697v2 processors

Mac Pro Late 2013 memory kit

This 48 GB kit contains three 16 GB DDR3 1866/1867 MHz ECC registered DIMMs built for the Mac Pro Late 2013 cylinder. It matches Apple order numbers ME253LL/A, MD878LL/A, MQGG2LL/A and model ID MacPro6,1.

240-pin RDIMM form factor

Modules use the 240-pin RDIMM form factor with ECC registered operation at 1.50 V. The registered design adds a buffer that helps maintain signal integrity across all three slots in the Mac Pro memory tray.

Lifetime warranty and US support

A-Tech backs the kit with a lifetime warranty and provides complimentary United States based technical support before, during and after purchase. Rigorous testing ensures each module meets quality and performance standards.

How it compares

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

Price $151.99
Cheaper than about 61% of the 21,161 comparable items (median $397.99).
Total capacity 48 GB (3 × 16 GB)
Higher than about 55% of the 20,941 comparable items (median 32 GB).
Price per GB $3.17 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 DDR3 Apple Mac RAM Memory Upgrades
Total capacity48 GB (3 × 16 GB)
Performance
Rated speedDDR3 1866 (PC3 14900)
Processor
ChipsetMajor Brand Chipset
Memory
ECC supportYes
Buffer typeRegistered
Heat spreaderNo
Power
Rated voltage1.5 V
Compatibility
Compatible systemsApple Mac Systems

Questions about this item

What DDR3 speed does this 48GB kit run at, and what bandwidth ceiling does PC3-14900 set?

The modules operate at 1866/1867 MHz DDR3, and the PC3-14900 rating caps theoretical bandwidth at 14 900 MB/s per module.

What physical slot count and pin layout must the Mac Pro Late 2013 provide for these 240-pin RDIMMs?

The Mac Pro (Late 2013) uses four 240-pin DDR3 RDIMM slots; this kit fills three of them with 16 GB modules.

How are the three 16 GB RDIMMs installed in the Mac Pro cylinder, and which slot order does Apple specify?

Remove the side cover, release the memory tray, and populate the top three slots in order — slot 1, slot 2, slot 3 — leaving the bottom slot empty.

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