DDR5 Overlocking / Safe Voltage?

[Pasic]

Im rookie when it comes to memory overclocking, just looking into expanding my knowledge a little.

I got G.Skill 6000 CL36 1.3v memory. Ive played around with latency and it doesn't like it at all, best ive managed to do is increase from 6000 to 6200 with bump of 1.43v to keep it stable Memtest86 in bios.
Now i can boot up and run bench mark with 6400 but it's not stable. I've read people pushing over 1.6v into DDR5, my Asus board ( Z690-i Strix ) goes up to 1.43 before i need to enable higher voltage unlock.

What is the max voltage you run on your ddr5

 

[Pasic]

my overwatch game keeps crashing. I think could be memory related as it seems to last little longer when default speeds are set.

I noticed there's 17c deference between Dimm 0 and Dimm 2 anyone know if this is normal.
I have fan thats blowing over ram, so not sure whats going on.

 

[Pasic]

Sorted - 6400 stable in gaming increased SA voltage to1.25v, MC voltage to 1.3v.
Heat still an issue need to keep below 60c, i guess that's downside of ITX and 3080ti pulling 450w