Question FPS Drop On Everything

[ErdincOTA]

I have FPS drops on everything, on Youtube videos, on windows, on games, everything. I deleted GPU driver with DDU and installed latest version but nothing. I tried with other monitor and HDMI cable. What is wrong with this PC?
R5 1400
RX5500XT
2X8GB 3000MHZ Corsair
500GB WD HDD (New)

 

[CheezyMemes]

whats your power supply

 

[ErdincOTA]

whats your power supply

FSP 500W 80+