Cpu i7 2720frequency drop down to 1.3ghz

Hi to all.I bought my clevo p170 i7 2720 with radeon 6990 graphics card 3 weeks ago.I discovered when I unplug the cable and work only on battery the frequency off processor is dropping to 1.3ghz.I tried to change the advanced setup in battery managment but it didnt do anything.Can somone help me?

 

that is just how intel cpus work on battery power.

 

Your CPU and your GPU should both downclock like that while on battery. It's normal and expected behavior to both 1) save battery life and 2) keep the machine running, as the battery doesn't have the power needed to run both at full clocks.

 

If you want to use the battery without it having to impact your performance, you could also manually change the clocks using programs like RMClock and Rivatuner (GPU). However, as MALIBAL #2 had stated, don't be expecting too much from the battery at that point.

 

In my laptop on battery mode in Super Pi test my CPU runs at full speed.

 

The speed "should" drop unless a demand for it is made in which case it will speed back up.

You "should" be able to change this by putting the laptop in "High Performance" mode in the power options under control panel.

 

I tried to change it but nothing happend. Frequency is still 1.3 ghz

 

In your tasktray look for an icon that looks like a laptop, right click and click "Power Conservation Modes". Put that on performance.

If you don't have this installed you are missing a sager app.

The only other thing you can do if that does not work is use a program to check your CPU temps and make sure they are fine and get one of the ones that lets you control the speed and set to max, otherwise may need to reinstall.

 

Thanks so much for help.Hotkey and change to performance like Bryanu said fixed the problem.Thnx

 

Glad that worked for ya

I have spent many years working with laptops so had to learn all these little odd things the hard way over time haha.

Anyway my only other advice if you are going to stay on performance (I do at least) is go into the power options in windows and advanced options and change the min cpu speed to 5% and keep max on 100%. I do it for both on battery and power adapter.

This basically allows your cpu to downclock when not under a load which keeps temps lower and uses less power, but without any performance loss because anything that puts a demand on the cpu it instantly jumps up the speeds.

 

I have an another problem. When I setup max processor power on 100% and ATI on max performance on battery mode,the laptop is turn off after few minutes . When I change ATI on save battery its ok but game its slow down

 

The whole reason why the video card and processor downclock on battery is that the battery can't sustainably provide the watts needed to run both at full speed. So, that's just going to happen. You could try finding a specific underclock that makes it stable with the battery though, by using some of the "overclocking" software.

 

So is not possible play on battery mode in any new game ?

 

It is, but not at 100% full speed on the GPU/CPU. Think of the battery in these machines as a UPS- it's there in case you need to move between outlets or do some light duty work off the mains, but not for intensive work.

You can play most games at lowered settings on battery without problems though.