Retired out of Glendale PD in Arizona… 
Almost afraid to tell people that anymore 
Understand about the laser in the same room, I have the same issue.
My machine is 5 years old, built from parts I bought at Frys Electronics, when they were here. It doesn’t run any video card, in fact I’m using the graphics chip on the motherboard. I don’t seem to have any issues. I run Linux, if that matters.
I sure wouldn’t think you’d need a high end.
The people at Lightburn I’m sure have a suggested configuration… I guess I have to look… Glad I did, try this thread. 