After reading Why is 8GB, Ballistix 204-pin SODIMM, DDR3 PC3-12800 memory module showing as not compatible with Macbook Pro mid 2012? on the Crucial forum, and the response from Crucial:
use our Apple branded Crucial memory
which doesn't explain the why it is not compatible,
I am curious whether memory modules that use different (lower) timings than Apple's modules with CL11 timing:
- Will the Crucial Ballistix BX Sport CL10 [BLS8G3N18AES4CEU/BLS2C8G3N18AES4CEU] modules work?
- And what will be the performance penalty or benefit?
Best Answer
Yes, Crucial Ballistix Sport memory modules with CL=10 timing do work.
The results of an Xbench 1.3 "Memory Test":
The not by Crucial recommended memory modules perform 13% faster then Apple's factory default modules in this Mac.
Benchmarking performed on a 15" MacBook Pro (Mid 2012, MD103xx/A, MacBookPro9,1) with 2 modules of identical memory:
Detailed results:
Hynix
Crucial