Esxi 6.5 won't boot after removing GPU

Hello,

I was playing with ESXi-6.7.0... My goal was to try GPU passthrough using old Radeon HD 8670 GPU.

I enabled passthrough, asigned it to VM, but when drivers is installed, it won't show anything on my screen. And I get Windows BSOD saying VIDEO_TDR_FAILURE (ATIKMPAG.SYS).

Ok, I understand, ths card is too old?

And after that experiment, I want to remove the card from my ESXi and physical computer.

So the problem is, that I deleted VM's, disabled passthrough in Manage -> Hardware -> PCI devices, rebooted several times. And when I remove the card from physical PCI slot, my ESXi won't boot and is showing black screen and I can't reach it from network.

Any ideas what can be wrong and how to fix?

Regards,

Dovydas