It has six gpu slots but you can't really tell until you insert 6x GPUs in the motherboard, some MOBO will have 6x space for gpu and the MOBO will fail to recognize all the graphic cards, if that happens well you can change gen mode in bios and try risers but if none of that works you will have to accept whatever the MOBO allows on board
i know i will use risers as i said in my initial post, but is there a chance such a high end MOBO will fail to detect at least 5 GPUs ?! change the Gen for what exactly ?...
thanks,
There is a setting in bios that has gen 1 and gen 2, switching can help to detect all six graphics card on a single motherboard, test the cards first and find a way to enter your bios settings, who know it's might actually helps