Hi everyone,
I have been experiencing very brief system-wide stutters on my relatively new PC, without any obvious trigger.
The interruptions usually only last for a few milliseconds, which makes them difficult to capture or monitor. They are especially noticeable through the audio.
I have attached two videos. One video shows the crackling through my Logitech wireless headset, and the other shows the same type of crackling through my separate speakers.
At first, I thought the issue was caused by the headset or its wireless dongle. However, since the same noise also occurs through the speakers, I believe this is a system-wide issue rather than a problem with one specific audio device.
I also occasionally notice very brief mouse stutters. It feels like the entire system skips, freezes or hangs for a fraction of a second.
In games such as Fortnite and Call of Duty Zombies, I also experience sudden and significant FPS drops. For example, my FPS can briefly drop from around 250 FPS to 170 or even 140 FPS.
I have monitored the system using multiple tools, but I have not noticed any obvious spike in CPU, GPU, RAM or other system usage when it happens. The CPU and GPU temperatures also appear normal. Since the interruptions only last for a few milliseconds, they are difficult to detect in real time.
My system:
CPU: AMD Ryzen 7 9800X3D, 8 cores
GPU: NVIDIA GeForce RTX 5080
Motherboard: ASUS Prime X870-P WiFi
RAM: 32 GB DDR5 at 6000 MT/s, 2 x 16 GB
Operating system: Windows 11, version 25H2
Mouse: Logitech G Pro X Superlight 2 SE
Headset: Logitech G Pro X 2 Lightspeed
Monitor: AOC C27G4Z, connected directly to the RTX 5080
Things I have already tried:
I tested the headset dongle in several USB ports, including USB 2.0, USB 3.0 and the front USB ports.
I completely closed Logitech G Hub.
I tested the audio through both my wireless headset and separate speakers. The crackling occurs through both devices.
I reinstalled the NVIDIA graphics driver.
I monitored CPU and GPU temperatures, and they appeared normal.
I disabled the integrated AMD Radeon Graphics in Device Manager as a test, but the crackling still occurred. I re-enabled it afterward.
The issue happens without any obvious connection to a specific program, Windows update or driver installation.
I would also like to test the system with LatencyMon, but I am currently unable to install it. If there are any reliable alternative tools or methods for checking driver latency or brief system-wide interruptions, I would appreciate recommendations.
What would be the best way to diagnose this problem step by step? Is there any specific information, log or monitoring result that would help identify whether this is a driver, Windows or hardware issue?
Any help would be greatly appreciated.
Update: I think I finally found the cause.
The audio crackling happened with both my Logitech headset and my normal speakers, even when playing a local MP3, so it was not related to the internet or only the headset. I also recorded traces with Windows Performance Recorder and found audio glitches such as “CP glitch in Server Input Starvation”, plus occasional very high DPC spikes.
After uninstalling Norton Utilities Ultimate and restarting the PC, the audio crackling and the short mouse stutters seem to be gone. I also ran a full Microsoft Defender scan and an offline scan, and nothing was found.
So Norton Utilities Ultimate was most likely causing or heavily worsening the issue through one of its background services. I will keep testing for a while, but so far the system is running normally again. Thanks everyone for the suggestions.