Question High FPS, 240 hz, choppy, not smooth image in games when moving mouse around ?

[sentenced06]

Hey guys, I seek for any help with my issue, which is: gameplay is not smooth especially when moving mouse around, textures are flickering (?), overall image on screen is choppy and jiterry, it feels like 60 or 80 hz instead of 240 hz mode. Audio is cracking/popping sometimes too, in menu, in youtube when adjusting volume. I'm trying my best to describe it. It has started 6-8 months ago, and is still present.

Games tested are - MW19, Battlefield 4/1/5, Rainbow Six Siege, I have also tried few singleplayer games: Doom, Metro Exodus, Stalker 1-2, some RPGs. It's all the same. The only game that was surprisingly smooth was Crash Bandicoot trilogy lol and I've played with gamepad.

My specs:
CPU: Ryzen 5600x Cooler: Dark Rock 4 (non-PRO)
MB: MSI B550 Tomahawk RAM: 2x16 3200Mhz Crucial Ballistix (BL2K16G32C16U4B)
GPU: Palit 3070 Gamerock OC
SSD: Kingston 500Gb NVME + Crucial 500Gb SSD
HDD: WD10EZEX 1Tb
PSU: Corsair RM750x
Case: Lian Li Lancool II Mesh RGB Black
Soundcard: Asus Xonar SE
Headset: HyperX Cloud II
Monitor: Acer XV253QX
Mouse: G403 Keyboard: HyperX Alloy FPS Pro

Temps are completely fine for me (CPU 50-60C, GPU 60-70, drives are 35-45, Mobo ~40C and so on), monitored it multiple times in the latest HWInfo. Frametimes, fps, 1% 0,1% all was good when I measured it with MSI Afterburner, haven't seen any big dips. LatencyMon gave me some weird results though, like 2k-6k latency for Nvidia driver.

I've tried alot of things:

• reinstalling Windows 10/11, maybe 7-8 times already
• installing old, new drivers (GPU, Audio, LAN, chipset)
• opening PC, cleaning the dust, reseating every single cable multiple times
• changing thermal paste (temps went lower)
• latest(beta) BIOS, old BIOS, PBO on/off, CPPC on/off, secure boot/fTPM on/off, XMP on/off/custom overclock, and more BIOS tweaks
• reseting monitor settings, trying GSync (Adaptive sync in my case) on and off
• capping fps at 200-237-240-245, leaving it uncapped, low latency on/ultra, Vsync on/off in many games many times
• taking out hard drives, SSD's, fans, audio card (I use Xonar SE, integrated is always off)
• remaking my rig on MoBo box outside of case, with no fans, only one drive with fresh Windows, only 1 stick of RAM

Maybe more things I forgot to mention. Literally ripped my rig inside out numerous times and it's still not smooth. Which makes me think it's some hardware incompability, or something with RAM/MoBo/monitor/idk what else.

Feel free to ask me anything, to do any test, measurement, any action just to fix this annoying issue.

I'm grateful in advance for any help.

 

[sentenced06]

Guys I've found something... 1% and 0.1% fps are too low, inb4 it's Afterburner bug or something
What can even cause this?

https://imgur.com/a/sPAZsyJ

View: https://imgur.com/a/sPAZsyJ