GPU Memory not recicled. Issue with Radeon 580 or Bios settings?

Hi guys!

I have an Asus Rog Strix Z390-i Gaming working very well, also sleep, etc...

But i have noticed my gpu memory going increased her usage and not recicled, i use istats. And yesterday using Unity3D after a few hours i have to restart program because there is no more gpu memory available and program send error about this when i try to do another bake of lights.

But i think the first day with hackintosh installed there is working fine the recicle gpu, could be in relation with AGPMInjector.kext? Or some parameter in BIOS like 4G Decoding?

And another question, when i go to info system and there is no info under pci devices, i have missed something? Apologies about my english.