Isolating bad gridseeds

[gamefixer]

I've got 30 grids and 6 that are acting up. Without putting some on a bunch of different computers all over the place is there a way to identify them in windows/bfgminer/cgminer? I think cgminer shows their serial numbers but the serial number isnt on the outside of the things anywhere.

Ideas?

[gamefixer]

nevermind... figured out how to bring up the serial numbers in bfgminer (m to go to device manager) and labeled them one at a time as I connected them.