For my own, i have many problems with asrock motherboard Z97 extrem 6.
First i go with it because of good adds/technical perfs. But the story was a bad story by the time... quickly.
In 9 months of use, mother board suddently failed. At boot time, she go in turn to reboot each 10 seconds, then quickly in 3 seconds.
After send back the motherboard to the Thai relaiser (impossible to have the Asrock company to know what's happen, and impossible to have a number of follower quality...), i had an other one (not new for sure) in more than two months !!! Theses one can boot, but failed to have more than 2 DDRAM (16 Gb), and has other problems for boot UEFI stuff.
I loose my time, my money, and there is no serious solution.
Consider, if you want to do somthing seriously, to never buy Asrock component, because of very bad quality of component and bed more quality of service when problem occur.
With some others company (has Corsair), if you have a problem, they never make story or never make you wainting long time, just change for real new one (who has been tested and works).
I don't know why Asrock loose his reputation by never assume there errors.
Good luck with Asrock, hope you will not do to much intensive work with this bad material quality.