I've big news from the technical Gigabyte staff.
They actually called with gigabyte HQ about this problem and they were shocked.
In conclusion, they asked me to send my CPU + motherboard combination for testing. (great deal, but the problem is that I need it every day for my study Bachelor of Engineering Physics, so we are looking for a solution)
When the staff can confirm the problem, they will investigate the issue and they also asked me to send the other motherboard where unlocking is working.
Seems that Gigabyte is damn serious about this problem!
big bonus points for gigabyte from me!!
@ mods
If I tell to much inside information, please don't hesitate to delete it (than also send me a PB please)
@ absic
Maybe you can refer to my issue and this thread if you contact the technical staff?
I will send a PB with the issue number if you like.