Please bear with me in this long post. I am in desperate need of help. All I want to do is add a FireWire PCI card. My Dual 1 GHz MDD is wonderful-I must use the sleep feature upwards of 6 times a day; waking it up anytime I need to. I love it. That's all gone now. I knew there were problems with FW PCI cards and deep sleep. That is why I went with the Sonnet Allegro FW 400 Card. Sonnet said that the card is fully supported under Panther. Fully supported. Well guess what. I put my computer to sleep, and the fans don't turn off. My computer is literally 1 foot away from my bed (not kidding). If the fans don't turn off, I could care less about deep sleep. So I sent that one off back to Sonnet. Hopefully I'll get my money back. I then bought this Belkin FireWire PCI Card from the Apple Store. I told them my story with the previous card and how it did not deep sleep. They said sure, it will work fine. 100 %. I am sure you can figure out what happened. Same thing: fans don't turn off. And, this is not a problem with my computer...I put the Belkin card in my Dad's AGP Graphic Power Mac-it does not sleep. He took his USB 2 card and put it in my computer. It does sleep. I guess they can make USB 2 to work with deep sleep, but not FireWire.... So, either no one understands what Deep Sleep means (including the fans shutting off) or everyone is lying to me-even Apple. This is so ridiculous I cannot even explain. Meanwhile, I've spent the last two weeks sharing my 2 FW ports with 4 devices. So I ask, is anyone using any FireWire PCI card that 100% supports deep sleep? I couldn't care less about the cost, I just need to get my Mac working again. Thank you inifitently for reading this entire post (if you did).