Show more details about RAM
The "About" dialogue in GNOME currently shows the amount of memory actually visible by the OS, along with hardware information, such as the CPU and Graphics used. On a lot of systems with integrated video cards, the OS visible RAM doesn't match "hardware" RAM.
For each slot, having the amount, the form-factor, the type (DDRX) and the speed of the RAM could allow showing something like
24GiB 2600Mt/s DDR4 DIMM, instead of
23.4GiB, or could show the separate memory modules graphically, along with the free space if any.