[Studio Dweller]

I assume that there’s no benefit of putting the HDX card in a 16X slot so I put it in slot 6 (8X, two slots below the Apple IO card) and yes, you will need the adapter for the power cable. I bought the Belkin set of adapter cables directly from Apple and it’s the one labeled “Cable set 3, PCIe Aux Power Cable 6-pin to 6-pin”. I have a 16x16 analog HD IO and a 192 IO (16 analog in, 8 digital out) connected to it.

I haven’t tried the ilok in the internal USB port.