Stuttering across multiple systems

[Fpsgamer]

Nothing to do with input lag, input lag was fixed way back. Don't know where to post it tho so I'll post it here and hopefully someone can help.

Hey, so I've been having stutter on every game since 1 year ago and I'm honestly about to give up and go sell my pc.
I was playing Valorant grinding Radiant and randomly 1 day my pc decided to start stuttering and ever since I haven't been able to fix it.
Literally started RANDOMLY.
I tried a lot of things and ended up replacing the whole pc, yet the stutter is still there.

PC 1

Ryzen 7600x
B650 aorus elite ax
Kingston 32gb 6000mhz cl32
Be quiet platinum 750w
rtx 4060
samsung 960 nvme

PC 2

ryzen 7800x3d
b650 aorus elite ax v2
g.skill 32gb 6000mhz cl30
Corsair 850w
rtx 5070
samsung 990 pro nvme

PC 3

ryzen 7600x
msi b650
g.skill 32gb 6000mhz cl30
corsair 950w
rtx 2080
samsung 980 pro

All have the same issue, consistent stuttering across all games.
Games ofcourse don't stutter at the same intensity, worst game by far is Valorant.
I've even tried different internet connections, peripherals, monitors, have double-conversion UPS.
Tried playing on both wifi and ethernet, tried ethernet cards instead of onboard ethernet.
Have tried almost every bios setting known to man.
I even bought paid optimizations that cost a lot of money.

https://imgur.com/a/pukVbXt#rUkUYlf

This is the first stutter/lag that happened, captured 1+ year ago.
Ever since then I haven't played a game with no lag.
Literally don't care about Radiant or anything anymore, just want to enjoy some smooth gaming.

[dermodemon]

For me disabling hardware prefetcher in bios fixed the problem

[Fpsgamer]

For me disabling hardware prefetcher in bios fixed the problem

No diff unfortunately, thanks tho.

[Fpsgamer]

Best fix I've found so far that reduces the stutters is removing the amd chipset driver, weird to say the least.
I tried experimenting with installing a few things from the driver but not all, so far the best feeling been no driver at all.

[Slender]

stuttering caused by cpu imc / ram controller,

[Vocaleyes]

Before all that niche advice. Is bios, vbios, gpu, mobo drivers up to date?

“Suddenly” without any settings changed and persisting could mean something became outdated.

[Fpsgamer]

stuttering caused by cpu imc / ram controller,

Same cause across 3 different systems out of the blue ?
How to rule it out anyway since all tests pass ?

[Fpsgamer]

Before all that niche advice. Is bios, vbios, gpu, mobo drivers up to date?

“Suddenly” without any settings changed and persisting could mean something became outdated.

Ye everything is up to date.
Nothing is outdated.
It literally went from buttery smooth to stuttery from 1 day to another so I have no clue.

[SeekNDstroy]

As it is 3 different system showing same symptoms, are all 3 systems plugged in same place?
I am not an expert and just throwing out some suggestions.
Though you said, you used double -conversion ups, electricity may/should not be an issue.

How about the temperature?
Also, did you try to clean installation of windows 10/11 different versions? Just install windows and basic drivers and install one game and try.

You said, you tried every bios settings and paid optimizations, did you try to reset bios/ check older/updated bios?
If possible use consistent clocks for CPU and GPU.
Assuming the rams are 16gb x2, did you try to seat them slot 1-3 And slot 2-4? Default mem speed. Not using any extension cable. HDMI or DisplayPort cable.

Try to monitor graph cpu/gpu clocks/ voltage/ temp with hwinfo64. I will suggest not to use msi afterburner as i saw AB cause such type stutters/hickups.

[Fpsgamer]

As it is 3 different system showing same symptoms, are all 3 systems plugged in same place?
I am not an expert and just throwing out some suggestions.
Though you said, you used double -conversion ups, electricity may/should not be an issue.

How about the temperature?
Also, did you try to clean installation of windows 10/11 different versions? Just install windows and basic drivers and install one game and try.

You said, you tried every bios settings and paid optimizations, did you try to reset bios/ check older/updated bios?
If possible use consistent clocks for CPU and GPU.
Assuming the rams are 16gb x2, did you try to seat them slot 1-3 And slot 2-4? Default mem speed. Not using any extension cable. HDMI or DisplayPort cable.

Try to monitor graph cpu/gpu clocks/ voltage/ temp with hwinfo64. I will suggest not to use msi afterburner as i saw AB cause such type stutters/hickups.

1 of them is on the same block but not the same house.

Temps are perfectly fine, tried even both w10/w11 ltsc but still the same.
Yes I've tried all of these and I don't use msi afterburner or any monitoring apps because I know they cause issues.

I'm at a point right now which I removed UPS and will leave the pc without it for a couple of days.
Also trying older bios versions to test whether it does anything, I doubt tho because when it began I didn't change bios and I was on w10 back then.