Yes, i am sure i didn't give the specs of my system, Is the following details OK for suggest a good Graphics card.
My specsI am sure it is very low)
Intel Pentium 4 CPU 2.66GHz, 1.5GB RAM, ATI RADEON XPRESS 200 Series
Your CPU seems too outdated to justify buying a new graphics card.. Better upgrade to a better CPU+Mobo first (you'll have to change the ram also) and then buy a new graphics card some time later..