I read from different posts the limit is 4, if you put more the motherboard cannot supply enough energy.
But I read also about rigs having 6 without issues for years.
Is that why i am asking which is the real limit ?
I am asking because I wish to make a new rig with both powered and unpowered risers but I need to know how much unpowered can be use safely?
It would depend on your mobo and GPUs. If your going to setup a rig, just get powered risers and be done with it. And I have run 2 GPUs on empowered risers no problem .