Are you sure it's 5466 and not 5446 instead?
If it's 5446, there's several previous threads that have answers posted. If it's 5466, I can't help you unless it came pre-installed in your computer (only if you tell me what the computer brand and model is). And are you certain the interface is PCI or ISA (or could it be integrated on the motherboard)? If integrated, I need to know the motherboard brand and model.