Não, não pode. De acordo com o manual, é apenas a memória física e na vida real você não pode ter mais de 100% de memória, consegue?
n: %MEM -- Memory usage (RES)
A task's currently used share of available physical memory.
o: VIRT -- Virtual Image (kb)
The total amount of virtual memory used by the task. It
includes all code, data and shared libraries plus pages that
have been swapped out and pages that have been mapped but not
used.
p: SWAP -- Swapped size (kb)
Memory that is not resident but is present in a task. This is
memory that has been swapped out but could include additional
non-resident memory. This column is calculated by subtracting
physical memory from virtual memory.
q: RES -- Resident size (kb)
The non-swapped physical memory a task has used.