PEX1IX is a PCI Express X1 Bus Isolation Extender that allows the user to test the single channel PCI Express add-on boards quickly, without having to power the system down each time. It is especially designed to save valuable labor and time in the production environment. It is also a great tool for engineers during product development, where changes and testing are often required. It also serves to protect the motherboard from damage caused by bad board under test. It has many outstanding features such as, local or external power and signal isolation controls, fused power lines with short circuit sensing and etc. It also allows external voltage margin and current measurement. The dimension is 5.9" L x 2.3" H (not including the PCI bracket).