The issue with that is the IDT chip is that it only has one mounting hole adjacent to it, so if you wanted a passive heatsink, it would have to be a permanent bond with something like the Arctic Silver epoxy compounds.

And I'm not sure how hot the IDT chip itself gets, but I would imagine it gets hot enough, switching one PCIe x16 into two x8's..


Eddy @ EK said he can make the block.