Yup, that's the one - EK-SB Max EX.

Covers the SB chip, and the Crosslinx chip.




Notice the stepped base - the difference between heights on the SB and Crosslinx is 1mm.. I measured for EK.

The cutout on the bottom is to clear a small capacitor on the motherboard between the two chips.


In the top view, the two barbs are right over the SB chip, and are parallel with the video cards, right in between the first two PCIe x16 slots.


I took a lot of measurements..