Is Windows Power Plan set to High Performance? Do you notice the CPU frequency dropping, for example going from 3GHz down to 2GHz?
https://support.microsoft.com/en-us/windows/change-the-power-mode-for-your-windows-pc-c2aff038-22c9-f46d-5ca0-78696fdf2de8
Since CPU usage is dropping during the spikes instead of increasing. It makes me think there's some sort of processing stall occuring. I have no idea where it's occuring (CPU, GPU, RAM) or what's causing it (EA anticheat, PC driver, game patch).
You can attempt to track down processing stalls with LatencyMon.
https://www.resplendence.com/latencymon
