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Green 240-pin DDR3 ECC UDIMM module with black chips

A-Tech

A-Tech 4GB DDR3 1066 ECC UDIMM memory upgrade for Mac Pro 2009-2012

SKU CH-QRHF-1T3VJ

Adds 4 GB of DDR3 1066 ECC UDIMM memory to compatible Mac Pro and Xserve systems

  • Total capacity4 GB
  • Rated speedDDR3 1066 (PC3 8500)
  • ChipsetMajor Brand Chipset
  • Rated voltage1.5 V
  • Buffer typeUnbuffered
  • Compatible systemsApple Mac Systems
  • Boosts multitasking with 4GB DDR3 1066 capacity
  • ECC unbuffered design protects data integrity
  • Certified for Mac Pro 2009‑2012 and Xserve
  • 240‑pin UDIMM fits original memory slots
  • Major-brand chips tested to strict quality standards

What this module is and who it serves

This is a 4 GB DDR3 1066 MHz ECC UDIMM built for Apple Mac Pro towers from Early 2009 through Mid 2012 and Xserve models from Early 2009. It installs in 240‑pin slots and runs at 1.50 V with unbuffered ECC. The kit targets owners of those specific Mac systems who need a straightforward memory increase.

Who should buy it and who should not

It suits Mac Pro 4,1 and 5,1 users matching order numbers such as MB449LL/A, MC560LL/A or MD770LL/A, plus Xserve 3,1 units. It will not fit machines that require registered DIMMs, a different pin count, or a non‑ECC memory type. Buyers with later Mac Pro models or standard PC motherboards should verify compatibility before ordering.

The spec that decides fit

The decisive figure is the DDR3 1066 (PC3‑8500) ECC UDIMM 240‑pin specification at 1.50 V. Only systems listed in the Apple model IDs MacPro4,1, MacPro5,1 and Xserve3,1 with matching processor configurations will accept this module.

How it compares

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

Price $17.99
Cheaper than about 92% of the 21,161 comparable items (median $397.99).
Total capacity 4 GB
Lower than about 90% of the 20,941 comparable items (median 32 GB).
Price per GB $4.50 per GB
Cheaper than about 81% 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 capacity4 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

What comes in the box and do I need anything else to install it?

The box contains one 4 GB DDR3 1066 ECC UDIMM module. No extra parts or tools are required for installation in a compatible Mac Pro or Xserve.

How do I pick the right version for my Mac Pro?

Match your machine to the listed Apple order numbers such as MB449LL/A, MC560LL/A or MD770LL/A and the model IDs MacPro4,1 or MacPro5,1.

What does the 1066 MHz speed rating mean once the module is running in my Mac?

The memory will operate at 1066 MHz (PC3-8500) with ECC error correction, giving the rated bandwidth for the supported Xeon processors.

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