Quote from: DBAGI on November 13, 2017, 07:06:56 AM

Hi,
I have a rig with 3 GPUs:
2xAsus Dual RX580(with modded bios)
1xSapphire Pulse RX570(no bios modification)
Motherboard: Asus H81m-pro with 4GB of RAM.
I'm trying to add one more GPU(Sapphire RX570) but with no luck. I checked all of the risers-OK, all of GPUs are working since I tried them one by one. My OS is Win10 and I'm using latest blockchain drivers from AMD. So, I tried DDU and clean install but no change, 4th GPU isn't showing up in device manager. Sometimes fans of this card starts to spin at maximum speed when I power on the rig and stays like that until I do windows reboot.
I checked bios settings but there's nothing particular to indicate this issue.
Only thing left is to reinstall windows but I think doing that would not fix the problem.
Does anyone have any idea what can I do to fix this problem?
Regards.

Does your OS not detect 4GPU at all or it detect it as unknown device or with any error code? Did you update MoBo BIOS to the latest settings? I've MSI MoBo with the same chipset and it works well with 4 GPUs both Nvidia and AMD