That's actually a great benefit for a short R9 Fury. The fact that 3rd fan blows air directly through the heatsink creates a huge cooling potential since it's not blowing heat into the PCB, making entire PCB hot. Part of it will still do that, but at least 3rd fan will cool only heatsink and nothing else. And that will greatly help distribute heat. I expected this to happen since vendors have already extended the heatsinks over the PCB, but never this far. And I think this will work really well.