Some problems with Graphics after fresh install

[mondrian76]

Hi...

Sorry my bad English spell. I have a 2013 MacPro (Trash Can). Always worked with Sierra without problems. 1 month ago i decided to make a Mojave fresh install. 90% of the time we use this computer for audio production, with Avid Protools. Since the Mojave install i notice some graphic freezes and computer slowdowns. Initialy i thought it was because i have only 16Gb ram, so upgraded to 64Gb. But the problem keeps the same.
Yesterday i installed a tool to check some system usage (iStat) i noticed a big memory usage on one GPU. What can be causing this? (Those prints were made without other open apps running)

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[MarkC426]

Unless you have some gpu task running, it doesn’t look normal.
My gpu processor/memory only gets usage like that when running an intensive program.

This would be better asked in the Mac Pro section.