PC8500 SO-DIMM 4GB DDR3-1066 - Ram Module

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MFR Part #:
DM50 223
Part #:
10 year, factory
Ships in 1-3 Days

Ships in 1-3 Days



For Unibody MacBooks, MacBook Pro w black keyboards, 21.5in and 27in iMac

  • Size: 4GB
  • PC3-8500
  • 1066MHz
  • 10-year Warranty

Installation Requirement

Some computers require RAM chips to be installed in sets. This is typically because the computer designers are speeding up the memory bandwidth by dividing the data across more than one chip; i.e. You can get twice the bandwidth if half the data is on one chip and half on the other.

Click here to use our RAM Finder to help you select the correct RAM for your Mac!

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Customer Review by: tdailey on February 18th, 2012

It was to install, and it made the computer much faster. Also, the 10 year warranty is nice, so I don't have to worry about if the RAM failed for any reason.

Small Dog Review by: smahoney on November 4th, 2011

Very quick installation! Made my computer loads faster! Extremely satisfied!

Customer Review by: mkaban on November 10th, 2014

Installed on a late 2009 iMac. Fairly simple installation, after looking up instructions on Apple.com. Went from 8GB to 16GB...it really makes a difference. Thanks to Jim for all of his great help, and the extra small doggies. My whole office runs on Apple. I recommend Small Dog to everyone.

Customer Review by: AlohaJ on May 17th, 2014

I add this to the used MacBook Pro I purchased from Small Dog. Great upgrade. Small Dog with install working flawlessly.

Customer Review by: mkaban on June 22nd, 2017

This is the 3rd set of these that I've installed in my 3 iMacs. The first time, the customer service rep directed me to the right item. SmallDog knows their stuff. Easy to install and they've worked every time. And I love my little SmallDogs. I have them on top of my iMacs. Too bad the new iMacs are so thin...but that will come later.