Graphics card

Hi everyone.
Need some advice on graphics cards.
Finally saved enough pennies to invest in a graphics card

I have an Inspiron 546s from Dell.I found a pretty good deal on a NVIDIA GeForce 310.
My questions are: 1.How do I know for sure if this card is compatible with my system? 2.Is this card going to provide a significant increase in performance over stock?
All input is appreciated
Thanks in advance
Need some advice on graphics cards.
Finally saved enough pennies to invest in a graphics card


I have an Inspiron 546s from Dell.I found a pretty good deal on a NVIDIA GeForce 310.
My questions are: 1.How do I know for sure if this card is compatible with my system? 2.Is this card going to provide a significant increase in performance over stock?
All input is appreciated

Thanks in advance