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lag spikes when charging

HP Recommended
HP spectre x360
Microsoft Windows 10 (64-bit)

i have problems with my pc performance when it is charging.


when i open a game while charging, my performance in FPS fluctuates.

what i notice is when i'm gaming, my pc is on 120FPS for five second, then the lag spike appears and my game runs on 0/5 FPS, or the screen freezes for five seconds, and then it turns back to normal. this does not occur when my pc is at 100% battery while charging, or when it isn't charging. this problem has been very annoying and it makes games unplayable. i do not know if it is my pc that causes it, or any damage, or if my charger is broken, or the outlet doesn't work properly, or the charging port is damaged. my pc has 8 GB available RAM, and has a Intel Core i7 processor. does anyone have an answer for this problem?

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