I installed the 5.5 driver into my old desktop running Windows 7 (32-bit) and didn't upgrade the H8000FW yet. Just loaded the Dice app to check the latency and stuff like that and I was very surprised to see that it's ultra-fast. The Dice app reports something like 160 us if I remember correctly! (I have a firewire card with a Texas Instruments chip).Haven't used the H-8000FW as a soundcard in Cubase 5.1.1 because I need to re-activate the thing and I don't have internet access from my desktop (yet). But if it works like a charm with Cubase then … beam me up Scotty!