Hey, thanks for replying.

I've tried a few different things in the CPU / RAM arena to diagnose this. Changing one thing at a time only. Since flicking that switch I haven't had a BSOD.

Answering your q's:

1) Prior to upgrading to W11, W10 had passed a GSAT and many realbench / cinebench runs. I'm confident as I can be that the OC is stable. I appreciate that this does not equate to "Game Stable".

2) I had considered using a GPU OC tool to achieve the same result and apply a voltage tweak. I'm going to spend more time confirming the system is "Game Stable" with the factory OC "off" before I start tweaking.

FWIW: Last time I tried GPU Tweak I found it buggy and unstable, definitely needed time to mature! I prefer to use the more lightweight tools for O/C and monitoring (nvidia inspector, SIV).

3) No splitters or extenders in use. All 3x cables are direct to the (less than 6 months old) ROG THOR PSU.

I think I'd do the same, run with OC off and try some games.

You have plenty of power with the Corsair AX1200i psu and using three separate pcie power cables as you're doing will provide the best stability.

It's quite possible yours is an under achiever when it comes to overclocking and can't handle the factory overclock.

When you get back to testing the OC, I might try manually overclocking with a tool you prefer. I'd start with just maxing out the power limit, then try a game again for stability and see how high clock speeds are going.

Thanks for taking the time to think about it, ignore my specs in the profile - it's a generation out of date!

I find it odd that this issue didn't occur in W10. Obviously WZ had the normal crashes, but never a BSOD.

I wonder if there's something about W11 and GPU OC's? (Factory or not!)

Well, I'm running two older titan xp's in sli on windows 11 and I overclock them. I mainly play Destiny 2 and I'm not having any problems. I don't play warzone but it could be the game too as some games don't take too well to overclocking.

Manual overclocking might be the way to go.

I'd run with OC off if that is stable.

Just curious of what resolution you're playing at and how many frames per second you're getting.

What are clock speeds boosting to with OC off?

It's running 3440x1440 @ 144hz.

To be honest, I haven't been monitoring what speeds it has been running or what FPS it has been getting!

With everything on (except RT) - it's smooth and pretty. Does that help?

I imagine you're getting good performance at that resolution, and I can see you wanting every frame per second at 144Hz.

Normally that error message is a power issue or too high of an overclock, would you have another game to try to see if it's just an issue with warzone?

If you want to monitor things in game I would recommend gpu tweak III, you may be losing out on certain features if you use another tool.

GPU Tweak III has OSD, you could give it a try again, I never had any problems with GPU Tweak.

I'm using GPU Tweak II here.