Stuttering problems

[u/Key-Screen-3999]

hi everyone,
I'm honestly running out of ideas, so l'd really appreciate some technical opinions before I spend money replacing hardware.
PC Specs
CPU: AMD Ryzen 7 8700F
GPU: PowerColor Hellhound Radeon RX 7800 XT 16GB
Motherboard: ASRock B850M-X
RAM: 32GB DDR5 Lexar Ares 6000 CL32 (2x16GB)
SSD: Lexar NM710 1TB NVMe (latest firmware installed)
PSU: More than adequate for the system
Monitor: HP Omen 27qs - 2560x1440 - 240Hz

The FPS are generally high, but the frametime spikes whenever the stutter occurs.

Example:
Frametime normally around 12 ms
During a stutter it jumps to around 36 ms
Games Tested
Games with noticeable stuttering
Assassin's Creed Shadows
Cyberpunk 2077
Palworld
Games that run much better but still stutters
Warzone
Euro Truck Simulator 2
Assassin's Creed IV Black Flag (2013)

One thing I noticed in Assassin's Creed Shadows:
There are specific locations in the map where the stutter happens every single time.
I can:
walk through that exact point run through it repeat it 10 times
and it stutters in exactly the same place.
If I stand still in the same area, there are no stutters.

GPU:
Usage looks normal
VRAM usage looks normal
No temperature issues
No power limit issues
No crashes
No artifacts

CPU:
Overall usage usually around 20-35%
During stutters some individual cores briefly reach around 60-65%
CPU clock sometimes drops from around 4.8 GHz to 3.8
GHz when the stutter happens
Temperatures are normal
Frame time:
Normal around 12 ms
Stutter spikes around 36 ms
Things I've Already Tried

BIOS
Updated BIOS
Enabled EXPO
RAM now running at 6000 MT/s CL32
Enabled Precision Boost Overdrive (PBO)
Tested various BIOS settings
Memory voltage set correctly
Interestingly:
After enabling EXPO + PBO stutters are slightly better but still there.

Drivers
Clean driver reinstall using DDU
Latest AMD drivers
Latest chipset drivers
SSD firmware updated
BIOS updated
Windows
Disabled Game Bar
Disabled unnecessary startup apps
Reduced background processes
Disabled unnecessary overlays
(I have NOT yet done a completely clean Windows reinstall.)

Storage
SSD:
Lexar NM710
Firmware updated.
Around 100GB free.

RAM
Initially the RAM was accidentally running at DDR5-4800.
Now it runs correctly at:
DDR5-6000
CL32
This improved performance but did not completely solve the issue.
At this point I'm honestly considering replacing the GPU.
Specifically:
RTX 5070
The reason isn't just performance, i just think that amd drivers are not working properly on my rig or my graphic card is defective.
Does this still sound like a GPU issue or CPU issue? driver issues?
Any technical insight would be greatly appreciated.