Video card queery

Hi All My video card is a gefrorce 4 Ti 4200. Recentley i changed drivers on some advice from 40.72 to 30.82,after rebooting my system is now telling me that i now have a Ti 4400,bit strange. I decided to try and rectify it,uninstalled 30.82 and reinstalled 40.72 but everything is still telling me i have a Ti4400 not a 4200. I dont see any performance problems. Should i leave it or will i have to make sure it is reading properly. Thanks in advance Shaun.