"There is a clear difference between these two power supplies. The CTG models are pretty plain looking, offer lots of power, and are not modular, so they are really targeted towards the server side of things. On the other hand, the CUG models look great, have a quiet 120mm fan, and are modular, so they are going to appeal to the gamer. What both of these power supplies have in common is their clean, stable, and quality power. Watch the Video to find out more..." ~3dGameMan.com