PCIe bus can be overclock to speed up the external graphics card. We set it to Normal.

The onboard VGA engine clk can be set higher than default of 314.32MHz. This allows us to increase the core speed of the integrated graphics.

Looks like ASrock decided to include a Quiet FAN option on this new board. Now you are able to set a CPU voltage and it will lower than fan speed to make the CPU fan quieter.