I have been playing world of warcraft and the game is choppy when I get into heavily crowded areas I run it on a Compaq Presario AMD Sempron Processor 3100+ 1.81 GHz, 384 RAM with sis 760 video card.
However the minimal requirements for WoW are
Intel Pentium® III 800 MHz or AMD Athlon 800 MHz
512 MB or more of RAM
32 MB 3D graphics card with Hardware Transform and Lighting, such as NVIDIA® GeForce™ 2 class card or above.
I cannot afford to buy both a graphics card and RAM at the same time so I was wondering which one do you think would make the gameplay less choppy. A graphics card or more ram?