Spent all day trial and erroring my RAM and finally pretty content with what I have. Kit is Corsair Vengeance 2×16 6400 32-40-40-84 out of the box, SK Hynix A Die (Rev 5.43.01). AIDA64 benchmark is the first image; second is my timings. Temps stabilize around 55C in TM5 absolut but it remains stable. I have already undervolted from the 1.41V XMP VDD/VDDQ/VDDIO (1.38 is set in BIOS but voltages will step up to 1.395 under load- if anyone knows why this happens I would love an explanation)
I would love to shave off another 5 ns latency if possible and would also like some input on what I can improve from here without worrying too much about temps. There were no signs of instability at trfc = 400 but I stopped the stability test when temps got over 60C.