I have been experiencing this problem for about 3-4 years. I have tried everything software-wise. Then I started changing parts. The fps drops and rises instantly in all games. Especially when I enter a battle or enter a crowded place. I recently installed Forza Horizon 5 and the game is almost unplayable due to the FPS. I've included the changed parts and Afterburner graphic below.
Changed parts:
GPU: 3 times zero RX 5600XT, G210, GT1030, RX6600
SSD: Tried installing system/games on M2 SSD, Sata SSD and HDD.
RAM: 2x8 GeiL RAM 3000 MHz, 2x8 XPG RAM 3200 MHz
PSU: Corsair 450W, Corsair 550W
Additional Components: Also changed mouse, keyboard, and wifi receiver.
The only thing that has not changed so far is the processor and motherboard.
My Current System Components:
Ryzen 5 3600
Sapphire RX6600
Gigabyte B450M S2H
XPG 2x8 3200 RAM
WD 512 GB M2 SSD
Seagate 1 TB HDD
Corsair 450W PSU
Changed parts:
GPU: 3 times zero RX 5600XT, G210, GT1030, RX6600
SSD: Tried installing system/games on M2 SSD, Sata SSD and HDD.
RAM: 2x8 GeiL RAM 3000 MHz, 2x8 XPG RAM 3200 MHz
PSU: Corsair 450W, Corsair 550W
Additional Components: Also changed mouse, keyboard, and wifi receiver.
The only thing that has not changed so far is the processor and motherboard.


My Current System Components:
Ryzen 5 3600
Sapphire RX6600
Gigabyte B450M S2H
XPG 2x8 3200 RAM
WD 512 GB M2 SSD
Seagate 1 TB HDD
Corsair 450W PSU