Desktop effects slow monitor performance

[Georgi Kourtev]

Hi all,

I post few times here with issue related to enabled effects and the refresh 
rate of the screen (the latter being really bad while th effects are on). This 
I have on three machines with rather really new hardware (all with 10.10, KDE 
4.6.1).

Some people here suggested ides but none of them worked.  Meanwhile I found 
this:

http://kubuntuforums.net/forums/index.php?topic=3099721.0

Before I give a try, can anyone share what is the difference of using OpenGL 
and Xrender? Would it be advisable to follow the suggested by this post, or 
the solution is elsewhere?  As usual -- any ideas are appreciated!
gk