Window 8 : RAM usage (committed memory) [duplicate]

Solution 1:

According to TechNet's introduction to new taskmgr:

Committed virtual memory is private, nonshareable virtual memory created by processes or the OS or drives that MAY need to be paged out. This always starts out in RAM and may get paged out if necessary. So committed memory can be backed by RAM (and if you have no paging file, it remains in RAM until the VM is deleted such as at process exit).

Source: http://blogs.technet.com/b/askperf/archive/2013/08/09/task-manager-in-windows-server-2012-and-windows-8.aspx

So.. yes, Windows is using page file if present but in general it reserves some space in memory - like mentioned above - just in case. However, this commited memory won't necessary be paged out.