Overclocking samsung E die

[The0]

So, i got a pretty good deal on a pair of used 4x4 gb crucial balistix 3000 mhz cl 15-16-16-40 1,35 v, wich i assumed would be Micron E die, but turns out to be the old Samsung E die.
Either way, it has overclocked really well, i got 3733 mhz 15-18-18-38 at 1,4 V. But i'm really bugged that i can't make it any further than that! I've tried raising voltage to 1.8 V, timings like 21-24-24-50, booting on one stick or two at dual channel, an it still hits the same wall...
So the question is: Did i hit the max oc potential of my kit, or going into secondary/tertiary timings and the different voltages of the memory controller, would allow me to pass this really solid wall? and would it be worth? any advices or tricks on overclocking this IC?

Some specs:

z490 asus tuf gaming
Intel core i5 10400f (yeah i know i fucked it up and this is the reason i'm going for high memory clock)

Crucial ballistix Tactical DDR4 3000MHz, CL15
Corsair CX 600