The motherboard is Asus P6T WS Professional, it has two PCI_X slots, but DeckLink Studio is in the PCI_EX_1 slot. Magically perhaps, but still works well.
Not tested in HD, but I can capture 10-bit SD PAL (DigitalBetacam SDI) and multi-channel playback without drop frames, from the internal RAID 0 (4x1TB SATA). I am very confident that will continue to function well, but has not yet had an intensive use.
I hope these data will be useful.
Néstor