Yes, I'd like to upgrade my computer to run Blockland faster. I've tried updating my drivers

But it obviously doesn't work.
So I would like to know if I should get more RAM, or a new video card...or both.
If I got some new RAM, would 1Gb be good, Or would I need more? I only have 512mb RAM.
This is the video card I was thinking about.
http://www.newegg.com/Product/Product.aspx?Item=N82E16814187084Thanks for the help.