9800 XXL cards are supplied with medion systems. im not sure about the clock speeds but it should be good enough for most gaming as its a 9800xx card and will perform very well at resonable resolutions of 1024x768 and above. pro and xt versions are better and are playable even at 1600x1200 depending on the rest of your system of course.
to give you a comparison click here
try tinyurl click here paste the website address you want to show us into the 'enter the url you want to make tiny' box and click 'make tiny url' then cut and paste that into the pca forum.