Do you know the manufacture date of your PSU (or remember when you bought it)? I ask because I just had a problem with my Seasonic 860W, which manufactures Corsair's PSUs. You can do a search for "seasonic 3080 problems" or "3080 3090 transient load spikes" and find some great detailed threads on this, but I believe the issues weren't resolved until 2019 PSUs.
I'm not guaranteeing this is the source of your issue, but it's something to troubleshoot. For reference, I started having hard reboots when launching Cold War when I upgraded to the 3090 Strix. Other games were fine. I could max out Red Dead Redemption 2 without problems, but as soon as I tried playing Cold War on max settings, I'd get a hard shutdown. I do still get occasional Cold War crashes, but they're rare after I upgraded to a Be Quiet Dark Power Pro 11 1200W. Also, I'd suggest checking Cold War settings. I believe on max settings, I'm utilizing almost 19GB of VRAM. You may get a smoother experience turning down some settings as you may be maxing out the 10GB of VRAM on the 3080.
I'm on the Windows Insider Dev Channel builds and noticed they didn't resolve a problem with build updates until the last build or two with AMD power plans being inaccessible unless you did a manual reset and reinstall of the AMD drivers. I'd need to uninstall AMD chipset drivers then go into command prompt to run "powercfg -restoredefaultschemes" then reboot and reinstall chipset drivers every build. I'm running Windows build 21277 on the AMD Balanced power plan for the 3900X with my 3090 set to the "quiet" mode on the selector switch and everything is running well. Be careful though since the latest Insider Dev builds can't run Cold War at all. BIOS version 3102 has been pretty good for me after upgrading my PSU, but I was able to run Cold War with my old PSU on 3003. 3202 BIOS has caused audio problems for me.
Thank you for your reply.
Fortunately I can consider those not to be a problem because the system works perfectly well with an Enterprise LTSC Version (1809) no bugs at all in Cold War nor in the computer's boot time. Everything loads normally and fast as hell.
It's surely something with the Windows update at 20H2 that is messing stuff up. Also, if you are running Ryzen 3XXX, our problems do not compare I guess. From what I've been reading it affects only Ryzen 5XXX users.
I've seen other people with the same issues: https://www.reddit.com/r/AMDHelp/comments/kx04vd/5900x_rtx_3080_bo_cold_war_stuttering_and_fatal/
Glad to hear that you've isolated the issue. I'm not sure if it's the same bug as the latest Windows Insider build, but neither Cold War nor Modern Warfare will launch on the last 2 Insider builds. It does appear they've resolved the issue today, so hopefully it helps the issues with the Ryzen 5XXX and Cold War.
Thank you for your reply.
Actually the Cold War issue returned even using the Enterprise edition. I didn't test it deep initially (just run a few DM vs Bots and a Face Off - 3v3). Yesterday I've tried to play multiplayer and the issue returned.
I will make a test with B450m Steel Legend from Asrock today and will most likely return my C8HW.
I just updated Windows to the latest build (21296), updated to the Nvidia hotfix drivers (461.33) and updated Cold War and Modern Warfare. I can launch Modern Warfare now, but Cold War will not launch. Previously, I experienced similar crashes and problems across both games. This makes me think it's a game issue rather than hardware.
Unfortunately (or maybe fortunately?), I haven't been able to source a 5900x yet and have no experience with the other issues. Hopefully they push out another update soon that resolves these problems for you.