What is a system requirements for what video card i need for fully enjoying Kwin effects and everything?
I have Geforrce 6100 (on board) and i can't say i'm enjoying... i can't even watch video on youtube is hard to believe but is very difficult to listen music with Amarok... when i launch amarok he loading about 10 minutes and when i download somethink the music lagg (i'm checked to not rescan music collection). I have 1.8 ghz CPU, 1 gb RAM, i think my video sucks i need none integrated video card but what card i need to fully enjoy?

Have you installed the appropriate NVidia graphics driver? The open source Nouveau drivers may not be providing the best performance in your case.

Just the integrated cards sucks everything is just so slow i got no nerves for that i mean its incredable slow you can do nothing with effects enabled so i now break my Kubuntu with reconfiguring xserver and bla bla and i can't boot in linux now so i have one original copy of windows 7 and i use it for now until i find some good cheap video card and to be honest... i got no nerves to use windows too
For the protocol... DON'T USE INTEGRATED VIDEO CARD'S