Load intel XTU (Extreme Tuning Utility). Click the tiny spanner top right off the bottom right display, make sure you can see the relevant parts by activating them. Run a test in Benchmark
Is your CPU staying locked to it’s highest possible speed?
Go in bios and DISABLE C STATE. For more performance try OC to permanent full turbo.
You might be getting throttling… The CPU will step down even though you have high performance activated.
Thermal if you’ve managed OC into turbo but cooling isn’t adequate.
Current if you’ve managed OC into turbo but current limits are set too low.
My motherboard (I cheaped out here) was current throttling, creating CPU voltage drop every time it happened. We can throw more voltage at the CPU but this will mean higher fan noise due to the extra heat. We need the voltage to be as low as possible without crashing. A CPU underload naturally drops in voltage, VDROOP, LLC (Load Line Calibration) are voltage increase curves designed to offset this, select the one that keeps your voltage stable. Current throttling is an issue as LLC won’t fix the short sudden drop in voltage that it causes.
Messing with current settings is another post (but increasing ICCMAX usually does it), if you don’t want to do that, clock your OC to a lower turbo where it doesn’t current throttle. Once Current is solved, thermal will become an issue, it’s a good idea to test with your fans on full, they can be tuned accordingly after finding a stable lower CPU voltage. We need that Undervolted Max OC for quiet high performance Studio machines. Fast cores, not more!!!
A lot of the tweaks aren’t recommended on LAPTOPs, they won’t be able to cool efficiently, buy a proper PC.