The CPU likely consumes 30-45W depending on configuration.
So it's not trivial, all things considered.
Where do you get the 12w from?
Right now I have 16gb and it's been great and I generally don't put much pressure on it (except for some occasional Android Studio virtualizing).
However, it seems as though software resource usage has a tendency to creep up over time so it seemed like more RAM would be a safe option. I also tend to use the computer more lightly when it's unplugged.
I don't know much about hardware so all input is appreciated.
Here's one example:
https://www.crucial.com/support/articles-faq-memory/how-much...
> As a rule of thumb, however, you want to allocate around 3 watts of power for every 8GB of DDR3 or DDR4 memory. High-performance memory such as Ballistix® parts can draw more power, especially if you overclock the voltage beyond XMP settings.
Similar numbers here for slower DDR4-2133.
https://www.tomshardware.com/reviews/intel-core-i7-5960x-has...
Power consumption adds up pretty quickly.