Question Irregular stutters on new/fast PC (not while gaming)

[ediofs]

I built a new PC 9 months ago (specs below). Since the beginning, I've had this issue where the PC sometimes stutters for 1-2 seconds. It happens irregularly, so it's hard to understand what's going on. Sometimes it happens a few times within 15 minutes, sometimes I don't notice it for hours. This happens when doing simple desktop work, using desktop applications. It seems to happen more frequently when starting an application or e.g. opening a new tab in Chrome, but it's not exclusive to that. Notably, it's not an issue while gaming.

It seems like the PC's FPS (across 3 monitors) gets very low (to just a few frames per second). This is noticeable in e.g. mouse movement and videos. This usually takes a couple of seconds and then everything is back to normal. Audio doesn't seem to be affected.

It's hard to do any kind of diagnostics, because it happens irregularly. That's why I put this in the Systems forum, because I have no idea what causes this.

Specs:
CPU: Intel Core i9-13900K
Mobo: MSI MAG Z790 TOMAHAWK WIFI
GPU: MSI GeForce RTX 4080 16GB SUPRIM X
RAM: Corsair Vengeance CMK32GX5M2X7200C34
SSD: WD Black SN850X 1+1+2 TB
PSU: be quiet! Pure Power 12 M 1000W
Cooler: Arctic Liquid Freezer II 360
OS: Windows 11 x64
RAM is overclocked to 6400MHz, everything else runs at stock.

 

[XxDarkMario20xX]

I would turn your ram overclock to 6200mhz or 6000mhz to see if there shutters because I have 13900k and ram upto 6400mhz and my system dose not like my ram overclocked to 6400mhz keeps crashing my games and when turn it down things are good. Also you can place caps on fps and also is your monitors have diffrent refesh rates maybe you can make sure they all set the same refesh rate and see that helps!

13900k can do upto 5600 MT/s anything above is classed as overclocked so maybe it dose not like your overclock and getting abit worked up making fps issues

 

[ediofs]

I'll try downclocking the RAM to 6000 MHz.

I don't understand what you mean by placing a cap on the FPS. My monitors are all the same and run at 144 Hz. AFAIK Windows has vsync enabled automatically on the desktop meaning the FPS is capped at 144.