My GTX 550ti can play shaders on the highest setting and still get around 30-50fps.
None of you have answered his question, I will. Its not the amount of ram that will make you able to run Shaders but your graphics card. Your graphics card handles all of the graphical stuff such as things on your screen and games. To describe what RAM is the simplest way to do so is like this, more ram the more things you can have open and doing at the same time. Just having a lot of ram alone is not enough, you need a graphics card and the ram will help for things like large amounts of bricks.