My advice would be :-
If you dont know what your doing, get someone who does know what they are doing to upgrade your PC.
There are many things that may need to be done, it may not be a simple case of buying a new graphics card and plug'n it in.
My last upgrade was a new Graphics card, but i also had to buy a new PSU (Power Surply Unit) as the one in my pc was not powerful enough and didnt have the power connectors to run the card i wanted to install.
If your want to learn.... great.... start by reading books, mags etc. Make sure you understand what your doing before you attempt it, as mistakes can be costly.
For me the learning process and the achievement of building my 1st PC from scratch was a great reward. Now my PC is 7 years old. And im looking forward to building my next. Just gotta talk the wife into letting my spend the many dollors it will cost.
