@aliitp2 the use of adapters is not 100% guaranteed to work and you are using a server motherboard, perhaps you can find some limit.
The use of mixed cards and brands won't be a problem, your challenge is to discover if motherboard can support the additional GPU exceeding the limit from 6 to 7 GPUs, most modern motherboards can support more GPUs, but it's not so easy, there are some motherboards (specially older ones) that will not work
Some brands like Asus I find easier to have more cards connected, but I had some MSI problematic to keep even 4 GPUs running
Most commom is to search your exact model + 7 GPUs and see if someone already tested
or
You will be the first to try, and do the trial and error
Keep us updated
The use of mixed cards and brands won't be a problem, your challenge is to discover if motherboard can support the additional GPU exceeding the limit from 6 to 7 GPUs, most modern motherboards can support more GPUs, but it's not so easy, there are some motherboards (specially older ones) that will not work
Some brands like Asus I find easier to have more cards connected, but I had some MSI problematic to keep even 4 GPUs running
Most commom is to search your exact model + 7 GPUs and see if someone already tested
or
You will be the first to try, and do the trial and error
Keep us updated
I will definitely keep you boys posted + video soon ...
