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Six green ECC UDIMM modules in a row

A-Tech

A-Tech 24GB (6x4GB) DDR3 1066 ECC UDIMM Mac Pro/Xserve memory upgrade

SKU CH-Q60E-A078P

Six 4 GB DDR3 1066 ECC UDIMM modules adding 24 GB to compatible 2009-2010 Mac Pro and Xserve systems

  • Total capacity24 GB (6 × 4 GB)
  • Rated speedDDR3 1066 (PC3 8500)
  • ChipsetMajor Brand Chipset
  • Rated voltage1.5 V
  • Buffer typeUnbuffered
  • Compatible systemsApple Mac Systems
  • 24 GB capacity lets you run larger workloads on supported Mac Pro and Xserve systems
  • DDR3 1066 speed matches the original specification for Early 2009 and Mid 2010 models
  • ECC unbuffered design detects and corrects single-bit errors for data integrity
  • Six 4 GB modules fill all slots for maximum memory bandwidth
  • Lifetime warranty and US-based technical support included with every kit

Apple Mac Pro and Xserve RAM kit

This 24 GB kit contains six 4 GB DDR3 1066 ECC UDIMM modules built for Apple Mac Pro Early 2009 8-Core, Mac Pro Mid 2010 8-Core, Xserve Early 2009 4-Core and 8-Core systems. It targets owners of those machines who need the maximum supported memory for virtualization, large media projects or scientific workloads.

Replaces lower-capacity factory DIMMs

The kit replaces the original 1 GB or 2 GB sticks that shipped with these Macs, letting you populate all six slots with 4 GB modules for a full 24 GB configuration. The upgrade is worth it when your current memory pressure forces frequent paging or limits the number of concurrent virtual machines. Systems already running 24 GB will not benefit from this kit.

Tool-free installation with slot-order rules

Modules slide into the 240-pin UDIMM slots without tools, but Apple's service manual requires a specific population order across the two riser cards for proper operation. The most common issue is inserting modules in the wrong sequence, which causes the system to recognise only part of the memory or fail to boot.

How it compares

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

Price $130.99
Cheaper than about 64% of the 21,161 comparable items (median $397.99).
Total capacity 24 GB (6 × 4 GB)
Lower than about 65% of the 20,941 comparable items (median 32 GB).
Price per GB $5.46 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 capacity24 GB (6 × 4 GB)
Performance
Rated speedDDR3 1066 (PC3 8500)
Processor
ChipsetMajor Brand Chipset
Memory
ECC supportYes
Buffer typeUnbuffered
Power
Rated voltage1.5 V
Compatibility
Compatible systemsApple Mac Systems

Questions about this item

Will the 240-pin DDR3 ECC UDIMM modules fit the memory slots on a Mac Pro 4,1 or 5,1?

Yes, these 240-pin DDR3 ECC UDIMM modules are designed for the Mac Pro (Early 2009, 8-Core) and Mac Pro (Mid 2010, 8-Core) which use the MacPro4,1 and MacPro5,1 model IDs.

What is the correct order to populate the six slots when installing this 6x4GB kit in a Mac Pro?

Install modules in matched pairs starting with the lowest numbered slots on each riser card; the common mistake is placing single modules across risers instead of filling pairs per riser.

If a module fails years later, can I replace just one 4GB stick or must I replace the full 24GB set?

Each 4GB module is individually tested and covered by the lifetime warranty, so a single failed stick can be replaced without returning the entire 24GB kit.

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