PEXP8-EX is a regular PCI EXPRESS X8 extender. It features pluggable fuses, power indicating LEDs and external power input connection. By changing the position of the pluggable fuses, it allows power from the motherboard or from an external source to power the PCI Express I/O board, on top of the extender. Therefore, the voltage margin can be performed through an external power source and current measurement can be performed by removing the fuse and bridged with an ammeter. Precision current measurement can also be performed by adding Current Sensing Resistor Pads next to the fuses. The PEXP8-EX can be ordered with optional header pins, for signal probing, or with a connector on the solder side (A side). Add -H for the header pin option or the -T for the additional connector option. The dimension of the extender is 4.13" L x 2.37" H (not including the PCI bracket).