We have been checking an issue related to the Virtual Memory when gaming.
The Root Cause is that when game runs full-screen on Win8.1 in resolution different than desktop resolution, DWM (Desktop Window Manager – part of Windows, which draws the desktop) has memory leak and eventually fills all the system memory and page file with unused data and causes the system to crash.
We have confirmed that it is a MS bug and the problem is not cause by our Graphics Driver.
You can check also a Microsoft post here for further information.
Since this is a Known issue, Microsoft is working towards a solution to resolve this inconvenient.