Hi @AlexA4, please shut down Windows (as opposed to simply suspending it; see http://bit.ly/1OfR3td for details), open the virtual machine configuration window (refer to http://bit.ly/1eQU5lF for assistance), navigate to Hardware -> CPU & Memory and allocate 2 processors (or just 1 if the total number of available processors is just 2) and 2 GB of memory for Windows [or just 1 GB if total Mac memory is only 2 GB (or) 3 GB if total Mac memory is 8 GB (or) 4 GB if total Mac memory is > 8 GB]. Then, select 'Graphics' and allocate 1 GB of video memory for Windows. Finally, ensure that 'Vertical Synchronization' is enabled and 'DirectX 9' is selected for '3D Acceleration' under 'Advanced Settings' and close the window. Thanks!
I should clarify the flicker effect only happens when navigating to the VM which is in full screen mode. It doesn't even happen every time, are you sure I should follow all those instructions? My iMac has 4 cores, 32GB RAM, 2GB video ram. Currently 2 CPU cores allocated to the VM, 16GB RAM and 1GB video RAM. Nothing bad happened until I upgraded to Parallels Desktop 13, which leads me to think a fix is needed.
I did check my 'Advanced Settings' and I have 'Vertical Synchronization' enabled and 'DirextX 10' selected. Also when is PD going to support DirectX 12?
Hi @AlexA2, DirectX 12 support might be enabled in future versions. Please try to change to Direct X 9 and let us know if that works.
