HELP with stutter

[zeli_666]

Hello guys, 
i need little help with this..

Soo i buyed yesterday 144hz 1080p monitor and now iam having big spikes in frametimes...

for example : before on 60hz 1080p monitor , battlefield 5 : running 80fps with like 12ms frametime constant and no lag and 61 C° on CPU and max 50% on cpu load... no lag
now on 144hz 1080p monitor battlefield 5: running 80fps like 12-25ms frametime ... stuttering sometimes , 72 C° on CPU and max 82% on cpu load... lagging sometimes.
i tried to unplug new monitor and play on old and bigger temps. are gone and stuttering too . soo i dont know what is going on..

i wonder if FACTORY RESET whole machine will fix problems...
CPU: RYZEN 7 2700 @ 3.9ghz
GPU: GTX 1650Super (OC)
RAM: 2x8 3200 cl16 VIPER 
mobo: b450 Aorus Elite
SSD-480gb
hdd-1tb, 0,5tb, 250gb
PSU: coolermaster GX 550W 80+ bronze
monitor : 1) (OLD) Philips 226VL 
2) (NEW) AOC 24g1
Please let me know what should i do
and THANKS for anything <3