Problem with RTX 2060 (12 GB) in Linux (Ubuntu/PopOS/Mint)

Nothing I believe. Its a fresh Pop!OS installation with miner. Nothing else. All I have done is running TRex, nvidia-settings enabled all gpu (for overclocking). Same as Windows.

Earlier in Linux Mint, it said Hardware acceleration is not working, hence shifted to PopOS. Its working fine, but whenever I open 2-3 apps, it just gets stuck.