I just tried a Conceptronic usb 2.0 (6 usb ports) with a ALI M5273, but it didn't work, i tried different pci ports, different window memory configurations, sometimes the system boots up, but when i execute pciinfo, it don't recognise the card, or appears 18 devices!!! :-o
I will try again with the old usb 1.1 Conceptronic card, my system is stable and Trident recognise it and mount a usb hub but i can't get any usb device working. I forget to mention that the Conceptronic usb 1.1 card, don't use a ALI chipset, it use a OPTi 82861 chipset. Maybe exist more compatible chipsets...