Did a couple more tests.
First same 5900XT and 2x32 ECC DDR4 3200 but on a x570 motherboard - all OK. So the CPU can work with the memory on another motherboard.
Then again with B450D4U-V1LQ5:
Added extra fan blowing directly to VRM heatsink. Heatsink now noticeably cooler. Still crash.
Same memory but changed B450D4U-V1LQ5 with another B450D4U-V1LQ5 - crash.
Changed 5900XT with a 5950X - crash.
Still with 5950X set RAM speed to 1333 and SOC voltage to 1.2V - had to wait longer - instead 5-7 minutes - it crashed after 1 hour.
So the combo B450D4U-V1LQ5 - 16 core CPU - 2x32Gb will not pass Memtest. Change any of the three and its OK.
First same 5900XT and 2x32 ECC DDR4 3200 but on a x570 motherboard - all OK. So the CPU can work with the memory on another motherboard.
Then again with B450D4U-V1LQ5:
Added extra fan blowing directly to VRM heatsink. Heatsink now noticeably cooler. Still crash.
Same memory but changed B450D4U-V1LQ5 with another B450D4U-V1LQ5 - crash.
Changed 5900XT with a 5950X - crash.
Still with 5950X set RAM speed to 1333 and SOC voltage to 1.2V - had to wait longer - instead 5-7 minutes - it crashed after 1 hour.
So the combo B450D4U-V1LQ5 - 16 core CPU - 2x32Gb will not pass Memtest. Change any of the three and its OK.
