hi , i read on forums that latest asus bios have problems with getting higher than 3200mhz ram since 2802
lot of people seem to have the same problem not getting 3600 to work, I had it too , but with the common problem : reboot with no bsod
you can try to set your ram to 3200 without using DOCP with the best timing you can set, for the moment, the difference won't be visible anyway