I use a program called

MemStatus 2.4 by
Kevin Reems (2003)

It shows memory and video memory usage.

It is excellent. I am working on a huge project, a team has been working on it for 12 months, and we found that the software had problems releasing video memory. This program allowed me to discover the problem and I was able to experiment to discover what the problem was and fix it.

I would post it. But a major problem with PGD is that it is impossible attach files directly.