I was not able to find any information on the slowest CPU speed that is supported by USB 2.0 cards.
I did find this at www.viaarena.com
"I have a USB 2.0 PCI card. When I attempt to install the drivers I receive an error message concerning theUSB Root Hub driver USB2VIA.CAT.
Answer:
This is not a driver issue. VIA has identified a problem with some USB 2.0 cards. Normally if a card appears dead or will not function, it is because the card has been designed for a PCI voltage requirement not supported by the motherboard in the system. Current motherboards support 3.3V PCI implementation and older motherboards support 5V PCI implementation. Many USB 2.0 PCI cards support both voltage requirements and work correctly. Others only support one. This is the responsibility of the card manufacturer. A list of recommended USB 2.0 PCI cards and a list of 3.3V only and 5V only USB 2.0 cards will be made available through this FAQ ASAP."
SOYO's site does not say whether the card is 5volt compliant or not.
I suggest that you do the following:
Disable your on-board USB ports (if present).
Install the latest chipset drivers for your motherboard.
If you have the USB card in the shared slot (next to an ISA slot) move it to another slot.
Chas
