System-wide micro-stuttering and elevated DPC/ISR latency?
System-wide micro-stuttering and elevated DPC/ISR latency?
Hardware Details:
Processor: Intel Core i7-14700K
Motherboard: MSI B760 GAMING PLUS WIFI (MS-7D98)
BIOS Version: 7D98vHC (2024-09-04)
GPU: NVIDIA GeForce RTX 3060 Ti (Driver 531.86)
RAM: 32GB DDR5 (XMP Profile enabled)
Operating System: Windows 11
Issue Description:
The machine shows sporadic micro-stutters that disrupt mouse control and audio playback. LatencyMon detects large interrupt-to-process latency peaks, surpassing 7500 µs. After adjustments, latency occasionally rises to 2000–4000 µs. Furthermore, the system logs an abnormally high count of hard pagefaults, surpassing 40,000 during testing. The most affected drivers by LatencyMon are Wdf01000.sys (Kernel Mode Driver Framework) and nvlddmkm.sys (NVIDIA Windows Kernel Mode Driver).
Actions Taken:
BIOS Modifications: VT-x, VT-D, CFG Lock disabled.
Interrupt Handling: All critical peripherals (GPU, Audio, LAN, NVMe) set to MSI Message Signaled Interrupts mode via MSI Mode Utility v3.
Network Testing: Temporarily removing the Ethernet cable (Realtek 2.5GbE) reduces latency below 1000 µs, though it recovers once network activity resumes.
Power Settings: Windows Ultimate Performance plan is enabled.
Welcome to the forums, newcomer! Please note the make, model, and age of your PSU. Regarding the two modules you mentioned, one is intended for your GPU drivers. For the latest Game Ready driver version on Nvidia's support site;
Driver Details | NVIDIA
Download the <dd~LanguageName> <dd~Name> for <dd~OSName> systems. Released on <dd~ReleaseDateTime>.
www.nvidia.com is 591.86.
If I were you, I’d ensure you’re using the most recent chipset drivers. Then, in Safe Mode, use DDU to remove all GPU drivers (intel, AMD, and Nvidia), restart, and manually install the newest GPU driver from Nvidia’s support site via an elevated command—Right click installer > Run as Administrator.
RAM:
32GB DDR5 (XMP Profile 1 Enabled)
Do you have a link to the RAM kit used?
Turn off xmp see if it makes a diff.
Your ram is 2 separate sticks and not a kit?
I possess two distinct sticks, and it seems XMP was already compromised.
I've used xmp 1 and xmp2 but nothing changed. My RAM is supposed to be a kit, it's two identical sticks I got together.
I tested LatencyMon on an idle desktop with nothing open. The maximum latency hit was 19,000 µs, which is even higher than before. Processes like explorer.exe and systemsettings.exe are generating a lot of high Hard Pagefaults without any activity. This behavior seems unrelated to a specific program running, so I think there might be a problem with Windows 11 Memory Management or the NVMe SSD controller. My SSD could be failing, or I might be missing the correct Intel driver for the B760 chipset.