FFS
read the damn manual, it clearly states no more than 8 standalone AMD cards are supported this means you can have up to EIGHT AMD GPUs on this mobo
but go ahead and complain if your 8+ amd setup is not working
i never build rigs above 6 Vegas (i only use vega64, + FE) and they run boringly stable at 44MH/s Ethash, 1980H/s Cryptonight
for details on how to achieve this visit my thread
https://bitcointalk.org/index.php?topic=2549085.msg25986603#msg25986603Ok, no... 8 GPU is OS (Windows) limitation not the motherboard. If you have used this motherboard then you would know that it does not POST (boot screen with company logo does not come) if you put more than 13 standard (non mining) GPU. Now, my post has shown that it can work.
Yes, 6+ rigs on vega need not be considered (due to power consumption and other reasons), but RX 500 or RX400, or NVIDIA's 1060, i would slap on 12 if not a 19 rig blindly to maximize PSU utilization.
Finally, reason why people are so pissed about this board is because Asus advertised this as 19GPU rig without making the terms clearly (terms where you need mining graphics card for more than 13 gpu).