Z790 Steel Legend and TZ5RS G.SKILL

Good morning,
I'm struggling with this motherboard and I cannot get 7200 MHz speed out of the ram (as per specification).

I chose this DDR5 G.Skill rams because they are certified for this motherboard, I have two sets of them, two Z790 Steel Legend (11.02 bios both) and two different Intel CPUs, an I7 13700KF and a 13600K.

Keeping all the bios default value, the rams are getting recognized at a base clock of 4000 MHz, so I just select the xmp profile, save and reboot.
Aida 64 ram test crashes in 3 seconds.

I tried also to disable Asrock Timing Optimization and DRAM Frequency Optimization, but the only results I achieve is getting the rams running at 3600 MHz, even if I select 7200 from the xmp profile.
After that, the only way to achieve a faster speed is to reset the cmos!

Is there any setup I have to do? I don't understand how Asrock could have certified this rams, if they don't work at the specification clock.
Thanks for any suggestion.

Hi, I have DDR5 TZ5RS G.SKILL 6000Mhz 2x16GB and they works only in 3000Mhz, if I reset cmos they may works in 6000Mhz ?

7200 is a pretty heavy overclock, you need a good CPU/IMC to be able to run that. Overclock is never guaranteed, at the gskill site it even warns: "Maximum memory speed and system stability depends on the capability of the motherboard & CPU"

Maybe you need to tweak some of the VDD_CPU or VDD_IMC voltages to get it steady, maybe your IMC is just not up to 7200 and you need to go one or even a few steps lower.