Troubleshooting constant reboots on desktop with ASRock X470 Taichi AM4 board / Ryzen 5600X CPU
I upgraded from a 2600X to a 5600X on my ASRock X470 Taichi, and since then I have near-constant random reboots. Most sessions last a matter of seconds, and it's difficult to tell if there is a particular kind of load that is associated with it. I haven't had success with proposed fixes thus far, so I'm hoping someone can advise on next steps.
EDIT: It occurs to me that I have not seen the machine reboot while I have been working in the BIOS settings menus, in case that's a clue to anything.
__________________________ CPU: 20h-2Fh (5600X)
Microcode: A20F10 / A201016
BIOS: X470 Taichi P4.88 [Beta] (flashed this latest version after problems appeared on earlier releases)
AGESA: Combo V2 PI 1.2.0.6b
RAM: G.Skill Trident Z DDR4-3200 CL16-18-18-38 1.35V 32GB (2x16GB) ([F4-3200C16D-32GTZKW](https://www.gskill.com/product/165/168/1536218236/F4-3200C16D-32GTZKW))
PSU: SeaSonic FOCUS GX 750 W 80+ Gold Cert
GPU: Asus Radeon RX 580 8 GB ROG STRIX
OS: Kubuntu 22.04 ______________
The following are some things that haven't worked; I'm hoping someone might advise on next steps.
Per [this thread](https://www.reddit.com/r/ASRock/comments/lbuqgc/cant_get_5600x_to_work_on_x470_taichi/), I upped the PBO to board limits (and also tried manually to 300 on each setting).
Per [this thread](https://www.reddit.com/r/buildapc/comments/tlf70g/cpu_upgrade_to_ryzen_5_5600x_pc_keeps_restarting/), I tried setting the RAM clock at the default 2133 with no XMP profile.
Per [this thread](https://www.reddit.com/r/ASRock/comments/lk4u41/x570_taichi_issues/), (for an X570), I added 30mV to the VDDP (to 0.95) and did a ~30mV offset on the VDDCR_SOC (+0.03125).
Per [my own thread ](https://www.reddit.com/r/ASRock/comments/vjcpmq/troubleshooting_constant_reboots_with_x470_taichi/) on /r/ASRock , I checked that there appear to be good connections between the PSU and all 12 CPU power pins at the top left of the board.
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I haven't messed with RAM subtimings in [this guide](https://www.reddit.com/r/ASRock/comments/f8zf1k/my_guide_to_amd_ryzen_asrock_motherboard_problems/) because I'm not sure what numbers my hardware would actually call for.
I have sometimes seen machine check errors (MCE), but it's really hard to follow up on them with any specificity. And my impression is that it's rarely actually the CPU at fault.
I have a 5800X recently tested by someone else that I could put in there if I really need to prove it's not a bad CPU or if there is some other specific way it could offer clues to the problem. I'm avoiding that so far because swapping CPUs in this particular box is a real pain, and the 5600X is what's intended to be used in it.
The longest-lived session I achieved [edit: *while actually booting into the OS*] was one where I manually turned off a bunch of cores at the OS level. But I don't have a good idea of how to follow that lead in a useful or systematic way (or even if there's a real correlation -- I just tried turning half the cores off and still got a very quick reboot).