Ryzen 7 5800X + RTX 4060 Ti — 1 year of persistent stutter/DPC latency, all fixes exhausted, need help

[RealNC]

Your issue origins from your wall socket

This isn't the EMI section of the forum. Don't post that stuff here.

[MK92]

Then move the thread to the EMI section, together with 20 other threads where the people are having exactly the same issues, and never ever managed to fix anything with some random software tweaks.

He replaced the entire PC (this alone is a huge red flag - it is literally impossible that you would swap every part and still have exactly the same, very specific problems), he also reinstalled Windows several times and already tried a hundred different tweaks to no avail, he has the problem both in games and in desktop.

So how could this be anything other than an external cause, such as power quality issue?

[kyube]

Thanks for the detailed questions, I'll answer each one:

Thermals & SSD:
- SSD: Kingston KC3000 1TB (NVMe)
- CPU temps during gaming: max ~83°C under full load (Cinebench), typically lower in games. No thermal throttling observed.
- GPU temps are normal, no throttling on GPU side either.

PSU:
- be quiet! Pure Power 12 M 750W (fully modular). Sorry for the confusion in the original post.

Windows versions tested:
- Tested on 22H2, 23H2, 24H2, 25H2 — issue persists on all of them.
- Have not tried 26H1 yet, planning to do a clean install with it soon and leave settings at defaults this time.

GPU undervolting:
- I saw it recommended in a YouTube video for more stable frametimes. I tried it but it made no difference to the stutter. I'll remove the undervolt going forward since you're advising against it.

Peripherals:
- Mouse: Razer DeathAdder V3
- Keyboard: Motospeed CK61
- Headset: HyperX Cloud 2 (connected via USB)

Full hardware history (what was swapped):

Original build:
- Motherboard: ASUS Prime B550-Plus
- GPU: Gigabyte RTX 3060 12GB OC
- RAM: G.Skill Aegis DDR4 3200MHz 2x8GB (16GB)
- PSU: Corsair CX650 650W
- CPU: Ryzen 7 5800X (unchanged throughout)
- Cooler: Deepcool AG400

Current build (parts replaced one by one, issue persisted after each swap):
- Motherboard: MSI MAG B550 Tomahawk
- GPU: MSI RTX 4060 Ti
- RAM: Kingston Fury Renegade DDR4 3600MHz CL18 2x16GB (32GB)
- PSU: be quiet! Pure Power 12 M 750W
- CPU: Ryzen 7 5800X (still the same unit, never replaced)
- Cooler: Deepcool AG400 (same)

LatencyMon / ISLC / Process Lasso:
Noted — I'll check your signature for the correct diagnostic approach. I used LatencyMon because it was commonly recommended but I understand it may not be accurate for DPC/ISR evaluation.

I apologize for the late reply.
I'm not sure why the moderation team of these forums has decided to axe this thread into this subforum... I assume it's due to rampant trolls such as MK92 contributing nonsensical comments to a actual issue you might have.
Nevertheless:
My personal opinion is that you should try and find a cheap R5 5500 or some other AM4 CPU and see if your issues persist...
You're likely not going to like the answer to this question. :p

Hey Kyube, I know you are a veteran and have vast knowledge about hardware and how it compiles later on to a gaming experience.
Do you have any PSU recommendations? My budget would be around 120-180 euros. Current GPU is 3080, R5 5600. If I ever upgrade, at most it will be medium build.

I don't know what concrete issue you're trying to battle, any PSU recommendation I give you might not help you in that regard.
PSU's are all about voltage ripple control & transient control
It's best to find Cybenetics certified ETA-Platinum at minimum
You can find them here