Jeff,

Have you looked into PreSonus specifications for USB ports? With their Firewire based interfaces, they eventually came out that they only worked well with TI chipsets for Firewire.

I built my desktop and purchased IBM ThinkPad Z61M around the TI chipset. Desktop became the family computer and the Thinkpad MOBO died in full about 2 years ago. Firewire on PC lappys is pretty rare these days - ended up selling my FireBox as a result.

This admission by PreSonus did not exist in product specs, but posted by their tech support in user forums. I don't know if there is something similar with USB 3 ports or not. Have you haunted PreSonus tech support forums on this matter?