atayaYou leave subtimings on auto? And if it’s not too hard for you can you post the screenshots of subtimings, so that I can try to put them in manually?
wwxwwAre you able to run them faster than 4000 with or without tighter timings?
wwxwwI can run 4300 at stock timing using the same G.Skill 4000 17-17-17, but can not run lower timing. Go figure...huh? I tried your setting at 43, 42, 41, and then 40 with no luck. Good for you, for sure.
SajinPossibly. See if adjusting your vccio & vsa voltages to 1.35 volts will help get the memory running.