slow core speed on using car adapter?

Just a question maybe someone can help me?!?
Every time I put in the 12V car Adapter to my E6500 or even the E6510 the core speed slowing down! I set Energy saving to High-Performance no effekt.
If I plug in the 230V adapter I get max core speed, even if I have no adapter at all (only on battery) I get max speed.
Is there any option to disable this throttling on the car adapter?

Thanks!

 

On some makes of notebook if they do not detect an authorised power adaptor the notebook will not run at full power.

 

The Dell auto/air/AC adaptor is rated at 65W and unless your computer has the Intel GPU, it will throttle to avoid the risk of overloading the adaptor (I'm assuming that the E65x0 behaves the same as the E64x0). I used to use RMClock to stop my E6400 from throttling (until Dell fixed the BIOS) and maybe Throttlestop will do the same for the new CPUs. However, don't overload the adaptor.

John

 

But it's a car adaptor sold by Dell for the notebook?
It's true it has only 60W instead of 90W but,
Its not understandable to my I have to unplug the adapter to get the notebooks full speed?
Yes I hope Dell find a solution for this, it would be fine for me that the battery will slowly going down with the car adapter, but slowing the thing lower as half of its speed is strange.

 

If the car adaptor is only 60 Watt then you have your answer, you will need an 90 Watt car adaptor if you want to run at full perfomance.

 

My E6410 with i5+540M and Intel graphics can draw up to about 50W without any recharging of the battery. If you have a dedicated GPU then you could risk overloading a 65W PSU which is why Dell implement CPU throttling in the BIOS.

The power system isn't clever enough to draw up to 65W from the mains and the balance from the battery and I doubt if that will ever happen. As already suggested, look for a car adaptor with a higher rating (an inverter is another option).

John

 

Ok.. thanks for the answers.. the throttlestop is a good emergency option for a short time of use!
Thanks!

 

Throttlestop is (most likely) going to cause your computer to overload the car adapter. You get full power on the battery solely because the battery is built to output that much power...the car adapter is not.

Between running the laptop and charging the battery, you really should look for at least a 90W power adapter.

 

Do any of these systems still come with a 65W adapter? Even with Intel graphics, the E6400's and E6410's that I've seen all came with 90W adapters. I don't think they're supposed to be using 65W adapters...

 

I'm not sure. At least with the introduction of the Core iX mobile processors I would imagine Dell is not using the 65W adapter now.