*PLEASE NOTE* This unit does NOT work with windows. It only works with Linux. This unit does not work with any Radeon drivers and only works with ROCm. For multiple cards to work in one system, this card typically needs a server motherboard. In our testing with a server motherboard, we are able to connect up to 4 of these MI25 cards at once, but not more than 4. We were able to connect additional cards that were not MI25 in addition to the 4 units. For example, we were able to have 4 units of MI25 and 4 units of RTX 3060 working simultaneously with a server motherboard.
We have also had good luck with the Gigabyte Z390 UD motherboard working with 4 units.