CPU Clock max even at idle

[PRATZiLLA]

I'm currently using an ASUS ROG G531GT laptop with an i7 9750h and the idle memory clock of the CPU is always above 4 ghz but once I put it under any sort of load it throttles down to somewhere around 3.2 ghz. My laptop is on balanced power mode and I have never overclocked it. I applied a 0.120V undervolt and the processor still throttles under load and temps always go beyond 90°C while idle temps are around 65-70 °C. I haven't replaced the thermal paste yet since I'm out of them and I can't get any right now due to the pandemic. Any suggestions on how I can at least get the CPU clocks to go down when idle like a normal laptop?

[SavageNeo]

that is normal behavior and temps for that laptop and cpu