Hi,
Dell XPS8500 from 2012, clean upgrade to win10pro 22H2
4 original DDR3-RAM Samsung modules, 4GB each
CPU-Z recognizes 16 GB
BIOS and Windows recognize only 8GB
MemTest86: recognizes 2 modules with 4+4 GB and 2 modules with 0+0 GB
Slots and modules cleaned
BIOS latest Version 14, set to...