A6 motherboard error

[berestean]

Hello.

I have a asrock taichi z270 motherboard.
When plug in 2 graphics cards, it works. When I plug in the third one and I switch it on, it enters BIOS and then freezes. On the motherboard it is written A6.
What should I change in the bios? or maybe a driver?

I also switched off the intel virtualization technology and hd audio.

 

[rocktalkrock]

1. What are the 3 graphics cards you are trying to use?
2. Are the 3 graphics cards overloading your power supply?
3. Have you first enabled CrossFireX in Catalyst Control Center?
https://rog.asus.com/wp-content/uploads/2011/12/CCC-enabled.jpg

 

[berestean]

1. What are the 3 graphics cards you are trying to use?
2. Are the 3 graphics cards overloading your power supply?
3. Have you first enabled CrossFireX in Catalyst Control Center?
https://rog.asus.com/wp-content/uploads/2011/12/CCC-enabled.jpg

1. I have Radeon Pro Duo, 32 GB graphics cards
2. I have a 1200 w power supply so it is enough
3. I will check the crossfire. With 2 of the graphics cards it works. With 3 it enters the bios directly and it freezes. The A6 error it is related to IDE or Sata driver

 

[berestean]

1. What are the 3 graphics cards you are trying to use?
2. Are the 3 graphics cards overloading your power supply?
3. Have you first enabled CrossFireX in Catalyst Control Center?
https://rog.asus.com/wp-content/uploads/2011/12/CCC-enabled.jpg

I have an update. I've disabled the intel virtualization technology and hd audio. I've changed the top of lower usable Dram from dynamic to 1gb, and PCIE link speed from auto to gen3 for all pcie.
After that I have managed to connect 3 graphics cards.

However, when I put the 4th one the computer doesn't switch on. I have just a black screen and a b2 code on the motherboard. How can I solve this?