The GUI didn't work Red hat 7.2

I have Voodoo rush and red hat installer chooses A3TD what Should I choose???

I don't Know what monitor Kind I have and red hat installer said that it's Unable to probe it ..SO what monitor I choose?????Plz help cause when I startx the PC said it 's error on /etc/X11/X
also when testing the display in the setup (installer graphical)the computer hangs up ......
also How to change X configuration (VGA and monitor type)from the text prompt........