"Think of the largest number you can think of, then multiply it by 8 – that’s how much RAM you should have." — Three Dead Trolls in a Baggie.
My computer and Jaimie’s have been getting terrible frame rates despite having upgraded our graphics cards earlier this year. An NVidia 8600GT isn’t the fastest card out there, but it should be enough to handle World of Warcraft with low video settings. I went home at lunch and upgraded our computers to 2 and 3 GB of RAM and we were getting decent to excellent frame rates. Now to test things out in Shattrath at peak times. The next upgrade will be a better motherboard/CPU and that’s a much bigger chunk of change.