What is the difference between GeForce 100 & GeForce 9300GE?

They brough back my computer from the company after repair, but the quality of the display is very bad and they replace my old GeForce 9300 video card whith this GeForce 100 I tried on control panel to change the resolutions settings but still doens't work when I put in higher resolution the monitor display everything very small or if I tried in lower resolution it displays the image too big|||9200GE