I wonder if this is a lower powered dual slot card, simply because the buyers of workstation models from HP, Dell etc would be unreasonably hamstrung by a three

I wonder if this is a lower powered dual slot card, simply because the buyers of workstation models from HP, Dell etc would be unreasonably hamstrung by a three slot model - traditionally these systems have a full powered x16 lane in the location that would be taken by a three slot cooler.