W9100 Memory 16/32GB?

We got a 2nd hand firepro W9100 -

Would like to know if there is an easy way to visually tell if it is 16GB or 32GB? Part number or something. We're trying not to search for a computer with enough power to support it. We have tested it on our little video test bench, but there is not a OS, just a power supply, ram, and monitor just to verify there is some output and the fan works.

The one here is P/N 102C6760100 000001