With windows, you can never have too much RAM. It's easy to install and not very expensive, just be sure to get the right kind. And make sure you're grounded. RAM can be fragile.

I can't understand the problem. True, I don't use windows and have 512M of RAM, but I record at 30x and the buffer is never less than 75% full. Could it be the software or hardware? Most burners come with a burner cd that should work well with that burner.