Greetings, friends
I bought an Asrock H110 pro btc + board that has 13 PCI-e slots, the problem is that in windows10-64bit and Linux it only detects 6 cards.
I do not know if someone has had the same problem and can help me.

The configuration of the rig is:
Motherboard Asrock h110 pro btc +
8 AMD RX560 cards - 45w
900Wat 80Gold power supply
Dualcore G4400 processor
4GB of ram ddr4

Thanks greetings.