MSI B550m-a pro will only work with one specific memory stick

So I just bought a new motherboard, a b550m-a pro. I tried booting it at first and it just didn't, the CPU light was on. With that I tried resetting cmos and stuff and nothing worked, then I tried with only one ram and it did. But the other memory is working fine, I'm testing in another computer and it is working. It also won't work with the 8gb 2400mhz of a different computer.

Basically: 8gb 3200mhz works in both slots 8 + 16gb 3200mhz doesn't work 16gb 3200mhz doesn't work 8gb 2400mhz doesn't work And each one works in another motherboard