I have it, only was able to get 6 GPUs to work.

TOLUD to 3.5 only got me from 4 to 6 GPUs, 7 had errors.

Messaged their support, nothing.

Always blows my mind when MB companies put 7 ports, when only 6 work. Other manufacturers like ASUS solved this with above 4G decode. Biostar is too cheap for that.