For better OC, the GA-990FXA-UD3 will be your best option. gigabyte 990xa ud3 can go up stable overclock at 4.9GHz with liquid cooling and as much as 4.6ghz with air cooling. The ASUS M5A99FX PRO r2.0 will not go as much as beyond 4.4GHz. as with my own experience. Good Luck!