Overclocking is possible. My friend has the same board and we overclocked his 6300 to 4.6Ghz.
See the blue heat-sink beside the CPU? Underneath that are your VRM's. Your number one concern is keeping this cool.
Either attach a fan to it or make sure air is blowing over them, especially if you're using liquid cooling. They will get very hot if you add voltage to CPU. I would set CPU fans to max.
For BIOS settings I would keep Vcore under 1.475 volts on this board. Use a north bridge core of 1.28. Disable all CPU core features. Use multiplier only to start, then add bus speed. Test your settings with RealBench or Prime 95. YouTube videos help a lot.
Remember, keep the blue heat-sink beside CPU cool!