Can someone please help? Just need to confirm. thanks so much!!!
I have a friend who have the exact motherboard you are asking and he is running 6x RX 580 with modified bios making 180 Mhash in Ethereum only mining mode , running from a few months without problems and without crashing.
It should work for you too but I suggest to go for Biostar TB250 PRO BTC or ASROCK H110 PRO BTC+ or ASUS MINING EXPERT as these are motherboards dedicated to mining. Their price is not expensive too.
I have the same suggestion as @Cereberus did, why don't you get those mining mobo, it supports more PCIe slots, and you do not require to use all, 6 gpu on it sure works without problem.