I have about 20 asus 250. I figured i would try an asrock. Had a friend who was having trouble. This boards work with a bit of tweaking. For instance even if the gpu is red in the bios detection , once you boot to the os the gpus do show up. You really need to use the mb video output. Make sure to set all slots to pcie gen 1. If you plan on more than 8 gpus. csm must be disabled. Microsoft virtualization must be disabled under cpu options in bios.above 4g enable vt-d disabled.