When entering Xconfigurator he detects the neomagicx card but you can't get it to run at the right resolution. Even if you check it with Standard VGA driver with a resolution of 640-480 the font is to big. The soundconfiguration gives also problems. After detecting the card he warns about the possibility of freesing with Dell Inspiron 3500 and asks you if he has to proceed. Select Yes and he won't go further.
sndconfig is fixed in the latest sndconfig (0.39-4) from Raw Hide.
I think this is fixed in 6.2 - at least, it works fine with my Dell Inspiron 3500.