Recent content by aurox87

Yeah that's also very high. If I can trust my LatencyMon readings you have some issues on your system as well (I mean you knew it already :P ). Probably like this: user reports bug to NVIDIA and gets the response "please contact Microsoft as this seems to be a bug in Windows". User reports bug...

What's the DPC count of the nvlddmkm.sys driver on your system after 5 minutes? On my broken installations it's in the thousands after like 10-30 seconds. On my working installations it's very low (336 in the screenshot above after 7 minutes).

Ok I am done with another giant round of testing. Quick recap: Situation I started out with: Windows 22H2 installation. 13900k MSI WIFI FORCE Z690 motherboard with most recent BIOS. Got a new 4090, installed it and had some problems booting. Got it to work after a couple of reboot cycles...

I went ahead and installed that Ghost Spectre customized Windows for some latency testing, using version 21H2 (sams as my main Windows atm). Funnily enough I also get DPC latency issues there from the nvidia driver: Compare this to my main 21H2 installation without the issues (both ran for...

Test the tweaks suggested here with a fresh installation of 21H2 instead of 22H2, that's all I can say. 22H2 is broken. What Windows version are you using? See above, don't use 22H2. The IrqPolicy is what worked for me, doesn't mean it works for you too. Try the other things mentioned here...

There won't be one, the DPC latency issue has many causes. I remember having it back like 10 years ago, the cause was some Microsoft default driver for my hard drive controller. The fix back then was to install the Intel RST driver. The other guy in here fixed it by enabling CSM... so there will...

Sure, I can't guarantee that changing the interrupt priority doesn't brick your system. Neither can you guarantee that changing power plan settings brick your system. If we want to argue on that level... What I simply don't understand is why Clanger derails the thread instead of focusing on the...

What's the point of that comment? If you don't want to change things on your system that's fine.

You can just start the tool and see what's the current setting (should be no mask) and revert back to that after you are done testing. Not complicated and I don't see how you could possibly brick your system doing that. It fixed the problem completely for me on 21H2. The mask that was previously...

Seems like I was logged into another account when writing the last post... quick update: on 22H2 the IrqPolicy fix loses effect after a reboot. I have to toggle between settings so the device (GPU in this case) gets restartet. The restart of the device together with the IrqPolicy seems to be the...

Ok I think I've fixed my DPC latency issue. I've tried ZEFIR001 suggestions, they didn't help at all. Then I've went into the BIOS (again) and disabled Virtualization, Speedshift/-step, Turbo Boost, C-States, Hyper-Threading, Efficiency-Cores, enabled CSM (as suggested above) and testet again...

Thanks for sharing! I don't see any nvlddmkm.sys in your list, do you even have a Nvidia card + drivers? Here are my results on a somewhat fresh Win 11 21H2 installation (with current Nvidia driver).

I'm waiting for the update! :) Interesting tip, I did not know that installing Windows with virtualization enabled adds more latency. Your suggestion for disabling Speed Step and P-States (I assume you mean those too) is kinda specific though. For audio production sure, but for gaming I'd just...

I've disabled Kernel Isolation after testing, no effect. Virtualization was not enabled as a Windows feature, Intel virtualization support in the BIOS was activated (default).

Just signed up to share my experience. I'm also suffering from insane DPC latency spikes on Win 11 22H2. PC specs: 13900k 3080 TI / Nvidia 4090 MSI WIFI Force Z690 / ROG STRIX Z790-E GAMING WiFi 32 GB DDR5-6000 (dual channel) 1500W Be Quiet! Dark Power Pro 12 Symptoms: high DPC latency...