The GX7990 & MXI-4 PXI bus expanders allow direct control of any PXI chassis from a desktop computer or from another chassis. The GX7990 and MXI-4 provide transparent hardware and software interfacing to the PXI bus using PCI bridge technology. PCI to PXI or PXI to PXI interface • Up to 132 MB/sec peak transfer rates • Supports 32 and 64-bit configurations • Available with a range of cables (copper and fiber)