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Green rectangular DDR3 RDIMM module with 240 gold pins and black chips

A-Tech

A-Tech 16GB DDR3 1066/1067MHz PC3-8500 ECC RDIMM 240-Pin memory upgrade

SKU CH-9TSN-5RC0V

16 GB DDR3 ECC registered RDIMM for Apple Mac Pro towers from 2009 to 2012

  • Total capacity16 GB
  • Rated speedDDR3 1066 (PC3 8500)
  • ChipsetMajor Brand Chipset
  • Rated voltage1.5 V
  • Buffer typeRegistered
  • Compatible systemsApple Mac Systems
  • 16GB DDR3 ECC RDIMM boosts Mac Pro responsiveness
  • 1066/1067MHz PC3-8500 speed matches Apple specifications
  • Registered design with 4Rx4 rank ensures data integrity
  • Compatible with Mac Pro 4,1 and 5,1 models
  • 240-pin form factor fits Early 2009 through Mid 2012 towers

Product identity

A-Tech 16GB DDR3 1066/1067MHz PC3-8500 ECC RDIMM 240-Pin module is a registered, error-correcting memory upgrade built for select Apple Mac Pro towers. It delivers a single 16GB stick that runs at 1.50V and uses major-brand chips validated for Mac systems. The part is brand new and carries the supplier's lifetime warranty.

Who should buy and who should not

This module suits owners of Mac Pro models from Early 2009, Mid 2010 and Mid 2012 with 4-Core or 8-Core Xeon processors such as the 2.26GHz E5520 or 3.33GHz W3580. It will not fit laptops, iMacs, Mac minis or any non-Mac desktop that requires unbuffered UDIMM memory. Buyers needing non-ECC or consumer-speed DDR3 should look elsewhere.

Deciding specification

The registered ECC RDIMM form factor and Apple-certified compatibility list are the single factors that determine fit. Only systems listed by model ID MacPro4,1 or MacPro5,1 and matching order numbers such as MB535LL/A or MD770LL/A 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 $50.99
Cheaper than about 77% of the 21,161 comparable items (median $397.99).
Total capacity 16 GB
Lower than about 70% of the 20,941 comparable items (median 32 GB).
Price per GB $3.19 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 capacity16 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

Does my Mac Pro need registered ECC slots to accept this 240-pin DDR3 1066MHz module?

Yes — this is an ECC registered RDIMM, so the Mac Pro must support registered memory; the Early 2009, Mid 2010 and Mid 2012 4-Core and 8-Core towers listed in the compatibility data do.

Will this 16GB PC3-8500 stick run at 1066MHz alongside the 1066MHz modules already in my Mac Pro?

The module is rated for DDR3 1066/1067MHz (PC3-8500) and will operate at that speed when installed with existing 1066MHz memory in a compatible Mac Pro.

How can I verify the system sees the full 16GB at 1066MHz after installation?

Open About This Mac ▸ System Report ▸ Memory and confirm the slot shows 16GB, DDR3, 1067MHz, ECC Registered.

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