This model is not found on the Asus website. That's a strong indication that it's an OEM motherboard. Did it come install in your pc at the time of purchase? If the answer is yes, then you need to identify the pc or visit the pc vendors website for support.
When asking for drivers for a motherboard, you need to be specific with what hardware on the motherboard you need a driver for since mb's can require several drivers.
And what's up with the weird member name: ie: d845grg2