2 x SiS 7001 PCI to USB Open Host Controller
and 2 root hubs for the USB1 ports on the motherboard. 1 at the back and I suspect our bord has a USB header for two front ports (if fitted)
2x Via Rev 5 or later USB Universal Host Controller and 2 root hubs for the 4 ports on the card.
Two ports share 1 controller
1 x VIA USB Enhanced Host Controller. to increase the card ports to USB2