New Ryzen 3800x build not booting on X570 with 4 sticks Ram

[Roguey000]

Check your ram timings and make sure gear down mode is enabled if it's already enabled then trysetting dram voltage to 1.4 try booting if no go then keep dram at 1.4 and set SOC to 1.15 try again if no luck then keep the previous voltages set as above and try setting VDDG to 1.050 and VDDP to 1.000 and report back.

Thanks for the info, after a some testing its looking like one of the dimms. 3 out of 4 of the dims work fine (at 3200Mhz), but one of them causes blue-screens, freezes etc. same timings, voltages, everything else. If I back off the speed, it seems to work but surely it should be able to run at 3200Mhz like the other 3. Ive contacted Corsair but im unsure what they will say. Both pairs were brought here (two years back) a few months apart. The serials on each pair are one apart. I thought it was the MB/CPU in the past, but now appears to be the ram (as shown with my new board).

[Update] I did some more testing, and it appeared one dimm didnt want to work at 3200Mhz. After talking with Crosair, they exchanged it for another. Now 3200Mhz works with all 4 dimms without a problem!