If I tried to use 4GB RAM and a G3900 Celeron CPU with a 19 GPU rig like this, I would probably have a bad time right? I've got 9 GPUs on these specs right now, and wondering how long I'll be able to go on like this.
You would have to check the cpu usage, as long as 19 gpu's are working and cpu usage is less than 80% then is okay.
This mobo has usefull feature that shows what is wrong with PCIE! 
Its far from plug and play but we actually dont have that many issues with stability of systems and if something goes wrong with pcie we see it.
cReepas
Its far from plug and play but we actually dont have that many issues with stability of systems and if something goes wrong with pcie we see it.
cReepas
He is talking about hotplug gpu's.