Thank you for replying!
Is the examined AVG BSOD from 2014.12.12? If yes than it's not actual since that BSOD occured from the old RAM kit.
However I did unistall AVG, but it didn't help. Today I got another BSOD, something about: memory_corruption, X64_MEMORY_CORRUPTION_ONE_BIT_LARGE (see the attached zip file).