I'd like to raise again the bug that exists in psinfo v1.78 (published on June 29, 2016).
As reported in a post on the archived forums psinfo (both 32-bit and 64-bit version) reports incorrect information about physical memory above 4 GB.
It's quite embarrassing that such a bug exists in psinfo as the systems with more than 4 GB of RAM have been in common use for at least 10 years.