2 Slot Graphics Card Width - ms.codes
Yes, you can use a graphics card from a different brand than your motherboard, as long as the card is compatible with your motherboard’s PCIe slot and power supply requirements.
[Motherboard/Graphics Card]How to install the graphics card on motherboard | Official Support | ROG
[Motherboard/Graphics Card]How to install the graphics card on motherboard
ASRock Unveils the Z170M-PIO2 Motherboard with ...
ASRock unveiled the Z170M-PIO2, a micro-ATX socket LGA1151 motherboard with a unique angled PCI-Express gen 3.0 x16 slot that lets you install a graphics card parallel to the plane of the motherboard.