On Fri, Feb 3, 2017 at 9:45 AM Zoran Stojsavljevic <zoran.stojsavljevic@gmail.com> wrote:

Ron, any (practical) example of above described practices? I have in my laptops here 6 x 4 GB DIMM modules and 2 x 8GB DIMM modules, all of them have SPD mounted.

DIMMs are so great but so old school :-)

on some systems, in flash, there are 4 and 8 element tables which are indexed by GPIOs .You use the 2 or 3 bits from 2-3 GPIOs to index the table and that's how you get your RAM programming. No SPD. You can see how much room this leaves for problems. 

This is just one simple example.

ron