My mining rig wont start

[Jaaj]

Specs:
Motherboard Gigabyte GA-H110-D3A
Cpu Intel Celeron G3930
4gb ram
Psu 850w and 600w
Gpu 6 rx 580 (2 by gigabyte and 4 by powercolor)
Can it run all 6 gpus or only 4 because when im mining with 4 gpus the rig shut downs after 1 hour.
I have 5 risers and 1 pci extender. Can the problem be from the risers cpu or the psu?

[mrbugera2]

what is the operating system?

[shibob]

I'm using Motherboard Gigabyte GA-H110-D3A as well, for this MB, you may carefully check the BOOT option.
Your problem may be caused by Boot I think. If you're using window, remember to choose BOOT to something related to Window_xxx, I dont exactly remember the option name.