I'm using similar settings with 32GB for 24/7 and I found that I don't need more than 1.15 VTT and VCCSA at 2400MHz, I also dropped PLL to 1.7. If you have 2133 Z, you should be able to run it comfortably at 2400 if you slightly loosen the first timings without having to increase voltage beyond 1.6.
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