RAM is not displayed correctly?

Question

Windows

In the process task manager, well, a maximum of 4GB, although it costs 8GB. Is the task manager stuck or is it a hardware problem?

Answer 1

The working set is shown here. You need to look at the allocated memory. Open "Details" and add the "Allocated Memory" column.
Tupit your computer illiteracy, unfortunately.
RAM and its allocation to a process is a tricky thing. Memory may be allocated, may be cached, may be "leaked"