Virtual RAM is virtual only, and does not exist in the real world. I guess the only tanagable evidence would be microscopic magnetic waves found on the holes of your hard drive. But basicaly, virtual memory is when your real RAM fills up and there's more data that needs accessing. It would then be placed on a specified amount of reserved hard drive space (4 gigabytes) and accessed like RAM. This is very bad, because even the fastest SCSI hard drive cannot even come close to the bandwidth of RAM. So having virtual RAM shouldn't be needed if you have enough memory. And it's even bad if you have to use it.