B450m Pro4, Ryzen 5 2400G constantly crashing

Well, here come the memtest86 results

Both Sticks in A2 + B2 on default settings
      4 passes 0 errors total

Took stick out of B2, Cleared CMOS, activated XMP
      4 passes 0 errors total

Switched stick, Cleared CMOS, activated XMP and it showed this

      1st pass 1 error
      2nd pass 0 errors
      3rd pass 2 errors different to 1st pass
      [Note RAM may be vulnerable to high frequency row hammer bit flips]
      4th pass 0 errors

I saved the report, if necessary i can paste it

So am i right to say, that the 2nd stick causes the issue?
Sending the kit back would be no problem.

Just for my curiosity... why do errors occur in one pass and in the next one not?

Basically I can. With lowered settings. But since the system crashes while idle even before I install anything on windows I don't think that this is a software problem. I started memtest86 with XMP on and had errors immediately after start. During the first pass 34 total. Now I cleared cmos, RAM is on that 2133mhz and finished pass #2 without any errors. Both bars plugged.
I guess that means they are OK, right?

ok friend your problem is simple, just update the amd chipset driver to version 18.10.0830 and that's it. I have my 2400g with that chipset and zero problems. with the asrock driver it had the same problem that you have. I also use the driver of amd 18.12.2 I do better than with the latest version. I hope to be helpful.

thx kerberos.

RAM is plugged in A2 and B2
By "default settings" you mean settings after clear CMOS which would be 2133mhz CL?? or settings stated in the specs of the RAMs which would be 3000mhz CL16?

Buying components declared as compatible (QVL lists) and then having nothing but troubles is a true pain in the ass, but i'm really thankful for your help.

Alright, so i disassembled the PC to review the components.
CPU is ok, all pins are sraight, sits perfectly (mhhh i love cooling compound so much.
Cleaned DIMM slots with compressed air from the can, investigated with a lens, and mounted RAM, checked seating twice.
Connected each cable, one by one, carefully watching for perfect fitting.
Cleared CMOS with reset button, worked 'cause FANs spin with default RPM.
Latest BIOS (b450m pro4, P2.00) i installed already days ago.
Started WIN10 installation
Crash before first windows screen, PC powered off. error code 0x000000???... was gone to fast to note it
Rebooted, WIN installation starts and works proper to the point of first reboot, reboots fine, there comes the ENTER KEY screen
Crash, error code: DRIVER_IRQL_NOT_LESS_OR_EQUAL, System reboots
Installation works till end, welcome to WIN10. I start edge browser to visit asrock forum and whine about the situation
Crash, error code: DRIVER_IRQL_NOT_LESS_OR_EQUAL, system reboots, i shut the PC off
This also was the most frequent error code i read with that system.
I investigated on that error and it says it should be a bad driver, but i aint install any drivers yet. All windows natives. Also on my first attempt the time between crashes increased as i put the RAM on 2933mhz but they still happen ones or twice an hour.
so whats next