The memory usage doesn't come from a too large pool usage (althoug 800 is still a bit to high). It comes from 1.6GB of Page Table and a bit to high NTFS metadata.
This is hard to debug. I tried it last year, but it never shows good result. You have to stop some tools until you find the one that causes it.
The Proc tag is used by RzSurround (sound driver?) and the CM31 to load registry hives.