Hi,
I have tried out 2103 last night (from 1302). I started noticing occasional reboot-crash. After ruling out every device and driver I found the bios update to be the culprit.
The system was so unstable it crashed even in bios with no peripherals plugged in. I have reverted BIOS to 1302 by flashback port/button (lifesaver) and the system is stable again with no issues.
No OC or modifications in bios besides these items:
-DOCP to default 3200 profile (4 x 16 GB Trident Z (NO RGB))
-CPU fan curve to silent and PWM
-Other fans only to PWM, standard
Specs:
Crosshair VIII Wifi
3900x
64gb TridentZ (4x16) - G.Skill Trident Z, DDR4, 32 GB,3200MHz, CL14 (F4-3200C14D-32GTZ)
Samsung SSD NMVE 512 GB 970 PRO M.2 (main)
Samsung SSD NMVE 1 TB 970 EVO M.2 (secondary)
MSI RTX 2080
be quiet! Dark Power Pro P11 1200W
UPDATE 1:
Workaround - set DRAM voltage manually to 1.36V that allows MB to keep stable 1.352V. Below 1.35V I have crashes and reboots. I also set DRAM current limit to 110%/120% instead of 100%.
Tested (standard settings, only DOCP enabled or not):
1. 64gb TridentZ (4x16) - G.Skill Trident Z, DDR4, 32 GB,3200MHz, CL14 (F4-3200C14D-32GTZ)
a) 1302 with DOCP - works
b) 1302 without DOCP - works
c) 2103/2204 with DOCP - doesn't work, random crash/reboot
d) 2103/2204 without DOCP - doesn't work, random crash/reboot
e) 2103/2204 with VDRAM set to 1.36V and current limit upped to 110% with DOCP - works
2. 32gb TridentZ (2x16) - G.Skill Trident Z, DDR4, 32 GB,3200MHz, CL14 (F4-3200C14D-32GTZ)
a) 1302 with DOCP - works
b) 1302 without DOCP - works
c) 2103/2204 with DOCP - doesn't work, random crash/reboot
d) 2103/2204 without DOCP - doesn't work, random crash/reboot
e) 2103/2204 with VDRAM set to 1.36V and current limit upped to 110% with DOCP - works
Also tested on mine friend's MSI MPG-X570-GAMING-PRO-CARBON-WIFI with 7B93v17 BIOS (AMD AGESA ComboAm4v2PI 1.0.0.2):
a) with DOCP - works (32 GB and 64 GB)
b) without DOCP - works (32 and 64 GB)
UPDATE 2:
The issue still exists on 2204.