First of all I have to say I'm all new to ubuntu. I just installed KDE and noticed right away that everything are really slow, like moving windows, minimize/maximize, open folders, even making a rectangle on the desktop takes 3-5 seconds.It's really sad because KDE looks ten times better than GNOME, anyway GNOME runs smoothly.

My laptop is an Acer 6920g, 3gb ram, intel core 2 dual processor
The graphic driver i am using is "NVIDIA Accelerated graphic driver (Version 177) [Recommended]"

I will use GNOME until I get this sorted out, it is basically just annoying to use KDE like this.

If you know someting, please post. Thanks for your time

there is a 180 Nvidia driver available to try

if you run top what is the app eating your cpu?

what happens is you turn off desktop effects? systemsettings -> desktop -> enable desktop effects

have you read showthread.php?tid ... idia+intel

If it is 177.80 you mean, that's the one I have installed.
It's Xorg which is eating my CPU. It stays down at 1-5% but when i do something, it becomes 100%

Turning off desktop effect didn't make a difference

177.80 is supposedly the magic fix, that solves most people's problems. Are you using any configuration tweaks like those described here
That is the only thing I can think of at the moment.

AFAIK the nvidia problem will not make the whole desktop choppy.

Is any process eating up 100% CPU? try use the command 'top' to check it.

Are you using scim (the complex character input method)? this is known to make KDE choppy and scim-bridge should be use instead.