Gaming on the battery... performance drops (7811)

what is slowed down when you unplug the 7811? Playing crysis @ 1280x800 and the game runs beautifully when plugged in... I plug the plug and it's unplayable... frame rate drops to a crawl ... and I can't play the game... I checked the settings in windows and I'm on high performance and I put the processor on 100%

what am I missing here?

 

probably your power save settings possibly throttle down the CPU or GPU when not plugged in.
You check the advanced power settings?
Also could be nvidia drivers throttle down the GPU for battery saving too.
Why would you play Crysis on Battery neway?

 

just to see what it would be like...

advanced power settings I have the CPU at 100% on battery... I can't find settings for the GPU

 

Pretty much the entire laptop downclocks when on battery. This is because if you try to run at the same wattage that you normally do when plugged in, you'll kill your battery VERY quickly.
For instance, the laptop in my sig uses ~120 watts when plugged in, but drops to ~80 watts when on battery. My CPU downclocks from 2.8 to 1.2, and similarly for the GPU.
There's no way around this, as this plagues every gaming laptop.

 

that sucks

 

Not really. It's a laptop for a reason. You need to have some portability.

 

did you switch battery settings to "high performance" from "balanced" ... not sure if it will help

 

blah blah there is a way around it.
you can use rmclock to make sure your cpu stays 100%
and you can disable powermizer in the nvidia driver to disable gpu downclocking.

however, that might result in your machine shutting down when your battery voltage drops. you can monitor your battery state via rmclock and if memory serves once it hit 10.8v the notebook will abruptly shut down. you will have to remove battery disconnect ac, replug and reboot.

some had managed draining their batteries in 40 min or so without those shutdowns, if interested how to disable powermizer :
http://forum.notebookreview.com/showthread.php?t=261929

 

thanks! that's what I've been looking for

 

Don't come running back to NBR crying when your battery dies within a half year... There's a reason they downclock everything, and do not make this a normal option... The battery isen't meant to be drained so quickly, and you'll stress it out to hell.

 

no problem buddy

 

40 mins.... lol, I guess no time to enjoy the pretty graphics.

 

Indeed not. Gaming on battery is like sending a virgin to the Playboy mansion.

 

lol dook you are too much

 

Be aware that Li-Ion/Polymer batteries are not made for high drain applications as well as fast discharge/charge cycles. Although the technology is definitely improving; which is why you are starting to see them used for power tools. But having tried one out (a Makita) they sure don't last very long and the batteries run hot. In addition you need special charging circuitry to prevent overheating and damage to the cells.

That's precisely why Ni-Cads are still in existence. They can take a beating in the construction industry and still work (except for the memory effect). Also as the current increases, the internal resistance of the battery causes a voltage drop. Ni-MHs are worse at that than Ni-Cds. However the main drawback for Ni-Cads is the capacity (Amp-hr's). For any of you that hobby in RC helis or cars, you know exactly what I mean... although Li-Po's are great for slow flyers!