HD 4890 doesn't work correct?

[MeXii]

Hope u guys can understand my English, i know it sucks. : )

 

I running Leopard 10.5.8 on a Computer with:

 

Q9550

EP45-DS3L

4GB OCZ Reaper

HD 4890 1GB

 

Before, I could just run my computer in really bad resolution, the grafic card was not installed.

 

So I search @ Internet and find this guide:

 

http://forum.hardmac.com/index.php?showtopic=6384

 

What I can understand it sould be enought with:

 

"With the release of Mac OS X 10.5.7, one does not need the previous non-official drivers provided for Radeon HD 48x0 with Mac Pro 2009. Thanks to Netkas, patched extensions are now available, you simply need to download and install the following package: http://rapidshare.de/files/47140484/...cards.pkg.html. without this patch, you will not benefit from Quartz acceleration."

 

So, i just installed the package and i can change my resolution.

 

Now to the problem, everything is laggy. Alot of screen thering en and all "effects" are slow. Something i've missed to install?

 

Video: http://www.youtube.com/watch?v=iTzPQJTiINI

 

Please help!