I recently built a system with an RTX 5070 Ti ROG Strix, Ryzen 7 9800X3D, TUF GAMING B850-PLUS WIFI motherboard, and 32 GB of RAM. Since assembling it, I've experienced annoying micro-stutters and occasional 0.1% lows dropping to around 20–30 FPS without any obvious reason. LatencyMon shows that nvlddmkm.sys has unusually high latency even while the PC is idle, and opening a window or File Explorer causes the DPC latency to spike dramatically.
I've already tried using DDU and reinstalling the NVIDIA drivers, testing older driver versions, disabling Global C-states, Core Isolation and Memory Integrity, HAGS, the Realtek network controller, Wi-Fi, Bluetooth, PCIe Gen 5 in favor of Gen 4, and various core parking settings. The system shows no noticeable latency before the NVIDIA driver is installed, but the problem returns afterward. The operating system is installed on a Samsung 990 EVO Plus 4 TB NVMe SSD. Has anyone found a reliable fix for this combination of hardware and drivers?
3 Answers
What type of drive is your operating system installed on? Storage can sometimes contribute to stuttering, especially if drivers or background tasks are involved.
When using DDU, disconnect Ethernet and disable Wi-Fi before entering Safe Mode. Install the NVIDIA driver while still offline, then reconnect only after the installation is complete. This prevents Windows Update from automatically injecting another display driver during the process.
I already follow that procedure when reinstalling the driver.
You could try MSI Utility v3 and enable MSI mode for hardware devices that explicitly support it. The GPU can also be set to a higher priority if the utility offers that option. Only change devices that are marked as supporting MSI mode; don’t force it on unsupported hardware. This may help with interrupt latency, although the issue could still be related to a recent NVIDIA driver.
I’ve already enabled it for the GPU. I’m not sure whether the same setting applies to the CPU, though.
It’s installed on a Samsung 990 EVO Plus 4 TB NVMe drive running over PCIe 4.0/5.0.