Q: Adding memory to mid-2010 iMac
Is there a recommended layout for mounting a pair of 4GB PC3L-12800/1600MHz and a pair of 2GB PC3-10600/1333MHz cards so I get the best array and a full 12GB RAM? Notice that the speeds (1600MHz and 1333MHz) are mismatched.
Before you reply, please be very careful about terms like 'upper' and 'lower' (or 'top' and 'bottom') slot, because the Apple documentation is exactly backwards from what everybody else says and does. They clearly say here (iMac: How to remove or install memory - Apple Support) that the 'top' slots are closest to the screen, yet all other sites, blogs, videos, help files, etc that I have seen refer to the 'top' (or 'upper') slots as those highest when the computer is laying on its face...hence those closest to the STAND.
Also, please identify what is meant by the Bank0/DIMM0, Bank0/DIMM1, Bank1/DIMM0 and Bank1/DIMM1 slots. Many sites say that the largest (or fastest) chip should go in the primary slots, but they neither specify which Bank (or which DIMM) that should be, or where they are, physically.
So far, I have discovered that I cannot mix cards of different speeds, and both 1600MHz cards must go in the same SIDE, not the same upper/lower slots....which is contrary to what EVERYBODY says.
Help?
Posted on Nov 17, 2015 6:22 AM