my PC: i7 9700k + 2070 Rog Strix.
Since a week or maybe more i get the same issue.
I tried:
1. repair game
2. reinstall game and origin
3. changed all settings to low
4. changed stuff i read on similar posts and tried some programs to balance CPU usage.
5. Reinstalled Windows again, coz i broke something, that everything started to lag, too.
It doesnt help at all.
What I experience: I start the game and the CPU load jumps up to 100 and as soon as I'm in the Lobby I have 70-80% usage. If I tab out of the game, the usage drops down to 20%-25% if nothing else is running except the game. As soon as I start a game and i get the loading screen, the usage falls down to 50-60% and stays stable. After the Champ selection it immedeatly jumps up to stable 100% CPU usage during the whole round. Tabbing out drops again to 25%. This causese FPS drops, too. The interesting thing: if I have other programs open, that use CPU, apex lags and stutters and uses the CPU same, like when nothing else is opened.
try capping your frames also try lowering your power mode to balance or even lower it may help you to ease the cpu load
