So I've read that 13 GPU's are max on one Rig. And that this is because this mining motherboard from AsRock has 13 PCI-E 1x slots. But now I've come across this:
Windows has limited max 8 GPUs on the system, and Linux (13 maybe). But with a few trick, we can add more than 8 GPUs on Windows.
This (as I understood it) allows you to put 4 GPU's per 1x slot. Wont I be able to user 4x13=52 GPU's per rig then?
People out there even try so hard to set up 10-13 GPUs. And stability issue will be the main problems for broke the limit.
Periodically, the rigs shut down. Also they need to serve. The downtime of your equipment is your loss. Think about it.