When I boot into Linux I get this error
[ 0.845956] mce: [Hardware Error]: Machine check events logged
[ 0.845957] mce: [Hardware Error]: CPU 1: Machine Check: 0 Bank 29: ffffffffffffffff
[ 0.845958] mce: [Hardware Error]: TSC 0 MISC ff1fffffffffffff SYND ffffffffffffffff IPID ffffffffffffffff
[ 0.845960] mce: [Hardware Error]: PROCESSOR 2:a60f12 TIME 1678519746 SOCKET 0 APIC 2 microcode a601203
The cpu has runned memtest86 without any errors and is stable. It is a AMD Ryzen 9 7950X 16-Core Processor
It is also impossible to use expo1 on KIngston DDR4 with part number KF552C36-32. I have four ram sticks.