since last week i started playing again and i have massive lag spikes and random crashes sometimes i can play for hours long and the other time i can't play at all just instant crash when i do something,

PC specs:
Ryzen 5 3600
16 gb Gb 3200mzh
Gigabyte RTX 2060 OC Super 8gb
Gigabyte aorus pro motherboard
Cooler master ML 240L RGB

Any tips what could fix this