Hi guys, I just bought a 2012 MacBook Pro to replace my 2010 MacBook Pro. I am thinking about replacing the 8GB Ram with 16 GB or 12 GB (just 1 new 8 GB Ram instead of 2 x 8 and leave one old 4GB in). My question: 1. How much speed gain does CL9 Ram offer over CL11 Ram in this model? Is it worth it? 2. Is there a downside with going 12 GB over the 16 GB option? 3. How important is 1.35 V? Will it use less battery or what is the upside to 1.5 V Ram, I read that both work in the 2012 MacBook Pro. 3. Which RAM should I use. I was looking into these: Crucial CT2C8G3S160BMCEU 16 GB Kit (8 GB x 2) (DDR3L, 1600 MT/s, PC3-12800, SODIMM, 204-Pin HyperX Impact 16 GB (2 x 8 GB) 1600 MHz DDR3L CL9 SODIMM Notebook Memory Kit both are CL9 RAM with 1.35 V 4. Why has RAM got double as expensive in about 1 year? I bought 2x8 GB Ram for my iMac 2013 about one year ago and it cost half! Seems like price fixing to me. The Ram companies were charged for price fixing 10 years ago, so it does not seem to be unlikely that they are doing it again.