Windows 10: CPU blocked at minimum speed after deactivating battery

Hello everyone,

I have a problem with my Asus TP300LA laptop and I was hoping someone might give me a hint.

Recently it's charger controller went wrong. It wouldn't even run on AC. To fix it completely I would have to get a new motherboard. Since I was about to buy a new laptop, I chose a cheaper repair, the battery was deactivated and it now only runs with AC power.

The problem is that the CPU is running only at 0,8 GHz on Windows 10. If I run Windows 10 on safe mode the cpu does go all the way up to 1,9 GHz (i3-4030u).

To make sure this wasn't a problem with some Windows 10 update or its drivers, I reinstalled a clean copy of Windows 10 in a spare HDD. The cpu still doesn't go higher than 0,8 GHz.

I read online that some laptops will lock at the lowest speed temporarely when the battery is flat even having AC power coming and I think my computer must be doing the same.

Having it running only at 0,8 GHz makes it pretty much impossible to use.

Does anyone know how to deactivate windows instructions to reduce speed in this situation?

(By the way, this is not a throttling issue for sure. Even if I put my fingers on the ventilation area under the screen while opening several programs it barely gets warm. Also the laptop's interior is completely clean and yesterday while installing the new copy of W10 it was even running without it's cover, it doesn't get hot.)

Thank you for your help

:)

 

CPU speed at 0.48Ghz during low battery


Hi,

On my laptop, I have noticed that the CPU speed is dramatically reduced from 1.98Ghz to 0.48Ghz whilst low on battery. As soon as I plug the laptop in, the CPU speed returns to 1.98Ghz. This loss of CPU speed has a great impact on system performance, rendering the laptop near useless.

My laptop is running an Intel Core i3, and I believe that the technology which controls the speed of the CPU is called SpeedStep. There is no option in the BIOS to turn this feature off. I have also tried to change this setting in the 'Power Plan' options (in Windows). I changed the minimum processor state to 100% and the cooling policy to 'Active'.

I would like to keep my CPU running at 1.98Ghz. Any suggestions?

(see this photo for clarification)

Many thanks.

 

CPU Speed Locked


At the risk of being redundant, have you checked C states and speed step? Also tried setting Minimum processes state 100% in power management.

 

CPU speed at 0.48Ghz during low battery

Power management and battery saving isn't the only thing controlling the CPU speed, there's also the cooling policy. Passive cooling reduces clock speeds to keep the heat down while active cooling favours boosting the fan speed. You should see 'System cooling policy' in your advanced power management settings.