The PCI-X to x4 PCI Express Adapter lets
you install a low profile/half-height x4 PCI Express
card into a full height PCI-X (3.3V, 64-bit) slot on a
server or other high-end motherboard.
With a physical x16 PCI Express female
slot connector, the PCI-X to PCIe adapter
all types of x16/x8/x4/x1 physical PCI Express cards
speed of x4), allowing an older system to run
the newest cards.