Smoke simulation crushing by just adding domain object

Hi people! I have a serious problem with the smoke simulation in Blender. I grab my default cube and make it the domain of my simulation, instantly with no simulation or flow being added it starts lagging to the point the AMD screen driver crushes. I mean there’s no simulation being played or flow to make any fire or smoke and It just crushes by just having a domain in the scene.
Computer specs:
Asus m5a88-v evo
AMD FX 8150
8gb RAM
I am attaching a simple video showing what happens (Sorry for my English and the quality, it’s my phone).

Thanks!