...Memory test failure A fault has been detected in memory above 64KB"
It actually, probably said this: Memory test failure A fault has been detected in memory above
640KBOn the pic, see the words between 640KB & 768KB, i.e. Legacy Video Card Memory Access? That memory space is mapped to the video card memory, not to the System RAM.
This is why if you have a 32-bit OS, with 4GB of RAM, only 2GB are definitely available & maybe another 1GB, if not used by something else. For WinXP-32bit, 3GB RAM & 1GB video card is maxed out. There is no more space available to address.
Good Old DOS was limited to 640KB.
Picture the street you live on. It's only so long & has only so many houses (lots). The only way to get more lots is to make the street longer (address space) or start dividing up the lots (redefining the map, too late for that). Each lot (house) has an address, so the mailman knows where to deliver the mail (data).
e.g., John, Jane, & Bob represent the data.
John Doe, 100 Main Street, Anytown 12345, USA
Jane Doe, 101 Main Street, Anytown 12345, USA
Bob Doe, 102 Main Street, Anytown 12345, USA