This is my cousins pc. We tried everything we could in msconfig, regedit, paging. When we go into the bios, the motherboard recognizes both dimms but it says that 8gb physical memory is available. Similar to this, when we insepct system info windows shows that the loaded total physical memory is 16gb but then it says that total physical memory is 7.95gb and shows only 5.89gb of that as useable.
Specs: CPU: Ryzen 5 1600
Ram: hyper x fury 8gb DDR4 2667mhz (x2)
Motherboard: MSI A320m pro-5
edit: just to be sure we put his ram sticks into my motherboard and they worked just fin