We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Green rectangular memory module with gold edge connectors and black chips on both sides

A-Tech

A-Tech 8GB DDR3 1066 ECC RDIMM 240-Pin memory upgrade

SKU CH-31KZ-476T2

8GB DDR3 1066 ECC registered RDIMM for Apple Mac Pro and Xserve models from 2009 to 2012

  • Total capacity8 GB
  • Rated speedDDR3 1066 (PC3 8500)
  • ChipsetMajor Brand Chipset
  • Rated voltage1.5 V
  • Buffer typeRegistered
  • Compatible systemsApple Mac Systems
  • 8GB capacity expands multitasking headroom for Mac Pro and Xserve
  • DDR3 1066 speed matches original system memory specification
  • ECC registered design protects data integrity in workstation workloads
  • 240-pin RDIMM form factor fits supported Apple tower and rack models
  • Tested with major-brand chips for reliable operation in compatible systems

Compatible Mac Pro and Xserve models

This 8GB DDR3 1066 ECC registered DIMM is built for Apple Mac Pro towers from Early 2009, Mid 2010 and Mid 2012 with 4-core or 8-core Xeon processors. It also fits Xserve units from Early 2009. The module carries Apple order numbers MB449LL/A, MB535LL/A, MB871LL/A, MC250LL/A, MC560LL/A, MC915LL/A, MC561LL/A, MD770LL/A and MD772LL/A.

ECC registered requirement

The single specification that decides fit is the ECC registered DDR3 1066 (PC3-8500) 240-pin RDIMM format. These Mac Pro and Xserve systems will not accept unbuffered, non-ECC or faster DDR3 modules. The 1.50V voltage and 2Rx4 rank must match the factory memory exactly for the system to recognise the upgrade.

Installation and common issues

Installation requires opening the Mac Pro side panel or Xserve chassis and seating the DIMM in a vacant slot until the ejectors click. The most frequent problem is mixing registered and unbuffered sticks, which prevents boot. Another common error is exceeding the model-specific slot limit, so verify the maximum module count for your exact Mac Pro or Xserve configuration before adding this part.

How it compares

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

Price $26.99
Cheaper than about 87% of the 21,161 comparable items (median $397.99).
Total capacity 8 GB
Lower than about 80% of the 20,941 comparable items (median 32 GB).
Price per GB $3.37 per GB
Cheaper than about 88% of the 20,941 comparable items (median $8.19 per GB).

New to this? Buying memory and SSDs with crypto — what to check, what it costs to pay, and what is never asked for.

Specifications

Product
Brand nameA-Tech
Product lineA-Tech DDR3 Apple Mac RAM Memory Upgrades
Total capacity8 GB
Performance
Rated speedDDR3 1066 (PC3 8500)
Processor
ChipsetMajor Brand Chipset
Memory
ECC supportYes
Buffer typeRegistered
Power
Rated voltage1.5 V
Compatibility
Compatible systemsApple Mac Systems

Questions about this item

What does the 1066 MHz speed mean once the module is installed in a Mac Pro?

The module runs at DDR3 1066 MHz (PC3-8500), matching the memory bus speed supported by the listed Mac Pro and Xserve models so the system can use the full rated bandwidth without downclocking.

How does the DDR3 RDIMM interface and ECC registration affect what the memory can do?

As a registered ECC DDR3 RDIMM, it presents a buffered load to the memory controller and provides error-correcting code protection, which is required for stability in the supported Xeon-based Mac Pro and Xserve systems.

What physical slot and form factor does this 240-pin RDIMM need to fit?

It uses a 240-pin DDR3 RDIMM form factor and installs directly into the Mac Pro or Xserve memory slots designed for registered modules.

More in Model-Specific Memory Upgrades

Similar items