I recently switch my GPU from a GTX 970 to a RTX 2070. With the GTX 970 I had no issues playing. FPS were not perfect but at around 60FPS the game was nice to play. After switching my GPU the situation has changed a little. I now get constant 144FPS, but as soon as I'm moving my mouse I have a massive frame drop and the cpu usage goes to 100%.
For the above numbers I have put everything on the lowest setting possible. My CPU is a Intel Xeon 1231v3.
Maybe try turning off the hyperthreading specifically for apex legends in nvidia control panel. I run on even lower specs than you and had issues like this too. But once I turn off hyperthreading, now the cpu usage is very less and also more constant fps with less stuttering. Hope this helps
