Yeah, but I had a Dell XPS M170, and on battery, the GPU (Geforce Go 7800) was also downclocking, but NOT so dramatically ! (the core clock went from 400 to 250; I think)
For example, Oblivion is smoother on battery on a Dell M170 from 2005 than on a G750JH !!!!!!!
Now, I KNOW that a 135 MHz Geforce 780M should be much faster than a 250 MHz Geforce Go 780 GTX , but there is a weird "stutter" you get when the G750JH is on batttery power.
Using GPU-Z with the "render test", I can see 940 MHz "spikes" (I'ts amazing how easily you can overclock the 780M), but almost immediately (1-2 seconds or less), the frequency drops to 135 MHZ....... and after a short time it goes up again to 940..... and this cycle goes on (135-940-135-940-135.......)
is this a "battery power stutter" ?