Is task manager supposed to somewhat-accurately reflect actual RAM usage? Because it seems like the percentages just don't add up. It'll say my RAM usage is in the upper 90%, but looking at the numbers in that column it won't add up to half of what my system has installed.

Granted, this is on an older laptop with 8GB and I can't upgrade it. I'm not expecting it to be a gaming rig. But it bothers me that the numbers to add up. Is there some way to figure out where my RAM is going to? Performance Monitor doesn't seem to have much more to say, either.