It's the mid tower.Is it the midtower unit or the slim tower? If its a slim tower then your limited to a tfx power supply which they don't make anything higher wattage. Usually dells were the only ones that had proprietary psu's.
But the Z200 is proprietary psu, which scares me. Z230 I'd think is the same?You should be okay then. But to be safe, I would open it up and look at the cables to be sure.
Good suggestion. We're purchasing something without looking at the internals though.Thats why I said to open the case and look at the power supply cables. As long as there are no weird connectors then a standard power supply will work.