You will be given a definition of a task first, then some input of the task.
You are given a passage. You need to construct a question about the information present in the passage. Construct a question in such a way that (i) it is unambiguous, (ii) its answer is the whole paragraph. Avoid creating questions that can be answered correctly without actually understanding the paragraph.

it means just what you may think it means, that your video card uses up to 128 MB of that 512 MB. What you want is a video card that has its own memory, otherwise your going to be lacking the full brunt of that 512 MB of memory.
Output:
what is shared video card memory?