Laptop CPU Throttle on Battery

[spacejamz]

Not sure if my google skills are failing me or not but I can't seem to find any hard info this....I do remember something about the battery draining too fast which can be bad which is why they are supposedly throttled...

When you are on battery power, is there something that limits the CPU speed?

My current (Gigabyte P34V2) and previous laptop (Clevo W230SS) seem to do this...both have i7 4710 HQ chips (IIRC) which should run at 2.4ghz with turbo up 3.4ghz...

No problems hitting 3.4 when they are plugged in but they only hit 1.5ghz on battery even after changing the settings to high performance (advanced setting for minimum CPU speed was even changed to 100)...

If I mess with the Intel Extreme Tuning utility, I can get it to hit 3.4 on battery but it doesnt stick...

Is there anything else I can do to prevent this throttling? The Gigabyte does not have a removable battery so I don't want to leave it plugged in when the battery is topped off...

any ideas?

 

[corkyg]

You should be able to control that in your power management settings.

 

[spacejamz]

You should be able to control that in your power management settings.

Under the Windows power settings, I have selected the High Performance plan and under the Advanced Settings, I updated the Minimum CPU speed to 100% under battery and plugged in.

Under the Gigabyte Control Center, I have selected the Performance profile. Under the Fan Profile, I have tried AUTO and MAX (just case there is any throttling due to fan speed limits)....

After changing these settings, it still never goes above 1.5ghz on battery unless I mess with Intel's XTU software...

 

[ninaholic37]

Funny that you cannot even do base clock (2.4GHz) on battery. I'd ask for my money back. Chips designed with less than half your TDP can do higher than 1.5GHz. What frequency do you get when you turn off Speedstep in BIOS?

 

[VirtualLarry]

My Asus X401 with a Sandy Bridge Pentium B970 or something like that acted that way too. On battery, it was throttled to 800Mhz, period.

Edit: Now you know why Intel-based laptops get better battery life than AMD laptops. LOL.

 

[ArisVer]

I just checked my notebook (listed in sig) running LinX on battery and it's running full at 2.4GHz.

 

[Dufus]

Leave it plugged in.

Once the battery is fully charged the laptop should stop charging it until it drops below a certain percentage, usually 95%. Check Windows taskbar notification. What are you trying to achieve by unplugging and constantly draining and charging it?

If you are trying to maximize CPU usage under battery operation and are using discrete graphics then disable it and use integrated graphics.

Limiting control is usually through ACPI/EC and CPU may be power limited below TDP when on battery. Check power limit and MPO flags.