Processor performance limited to 0.78GHz with 34% usage when connected directly.
Processor performance limited to 0.78GHz with 34% usage when connected directly.
My CPU is limited to 34% usage and runs at 0.78GHz with a base clock of 2.30GHz, which makes the system feel sluggish. I own an HP Pavilion Gaming Laptop from 2018 equipped with an Intel core i5 8300H, 32GB DDR4 2666MHz RAM, GTX 1050TI, a 1TB Samsung 970 Evo SSD, plus a 1TB HDD and a 5TB external drive. I performed SFC/scannow and DISM cleanup, checked fans and thermal throttling with hwinfo, verified drivers and BIOS updates, reinstalled Windows for stability, and started in safe mode where CPU usage returned to normal but speed remained capped at 2.3GHz. Disabling virtualization and adjusting the power plan helped temporarily. I suspect a faulty power supply might be the issue, as it operates normally on battery. The BIOS version is F.29 Rev.A, and the power brick is 150W barrel plug (100-240V, 2.5A).
The BIOS on the HP laptop is quite restricted, making it hard to see what data comes from the power brick. After running the HP diagnostic tool before turning on the system, the AC power brick passed the check, but it provides limited details.
I owned the same laptop before, facing this exact problem too. It seems a few people here encounter it every couple of months, suggesting it might be a general issue with that model. The solution I tried was installing ThrottleStop from TechPowerUp and disabling BD ProcHot, which let the system run at full speed whether powered on or on battery.
Thank you for the suggestion. I've already tried that route, but it didn't help. I'm going to attempt it once more to see if anyone else has had success or encountered a comparable problem.
You may need to experiment with various ThrottleStop iterations to achieve the desired result. Apparently, a particular update helped on my machine, but you might find success with earlier releases as well. It’s hard to recall the exact version I used.
I wasn't aware I would attempt it tomorrow and inform you. The previous time I tried throttle stop, I used the newest release possibly due to that.
ThrottleStop 9.6 functions properly to address this throttling issue. If BD PROCHOT is restricting your CPU to 0.78 GHz, it might be due to a power limit setting of zero. The ThrottleStop reasons window should display the cause of the throttling, and the TPL window should indicate the current power limits.