I was hoping that someone might give me some ideas about why my hash rate is only 18 Mh/s for my RX480. I read that it should get around 22-23 Mh/s out of the box. I know I can modify the bios and tweak the core and voltage, and I will do that. I am just wondering why I am off 20%. Could it be my motherboard? It is an 5 year old LGA1155 board. How much does the motherboard affect hash rate?