Best RAM Upgrade for iMac and MacBook Pro 2012-13

Apple's prices for memory upgrade are outrageously high. There are other companies on the market specialized in MAC Upgrades and selling RAM that meets the Apple requirements, but they do not always offer the fastest possible RAM that is supported by your Mac, and they can be overpriced too.

As a general rule get a Mac with stock RAM and upgrade later. I have personally tested the Kingston HyperX LoVo KHX16LS9P1K2 which is the most powerful RAM you can use in your MacBook Pro 2012-13 and iMac 2012-13
Some Key things to know about RAM:
  • Type: here you will see any number of acronyms, including DDR, DDR2, DDR3, FB-DIMM, and more. You cannot substitute one type for another.
  • DDR memory is not backwards compatible: you cannot substitute DDR with DDR2/DDR3, or DDR2 with DDR3.
  • There's also ECC (error correcting RAM), which could be installed in recent Mac Pros.
  • Speed: could be expressed in MHz, or as PCX-Y number - where X stands for a DDR version number, and Y for a maximum data transfer rate (MB/s)
  • Speed (MHz) DDR3-800 DDR3-1066 DDR3-1333 DDR3-1600 DDR3-1866 DDR3-2133
  • PCX-Y PC3-6400 PC3-8500 PC3-10600 PC3-12800 PC3-14900 PC3-17000
  • Format: You will usually see DIMM (desktop full sized modules) and SO-DIMM ('notebook' size modules). Each format is divided to subformats by a number of pins.
  • Pins: Different physical sizes of memory chips usually have different numbers of pins.
  • Common numbers for current machines are 204 pins and 240 pins.
  • Macbook Pro and iMac are using 204-pin SO-DIMM.
  • Size: Different memory modules could accomodate different volumes of information.


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