Right HB sli bridge??????

Hi guys, please can someone help me with the right HB NVidia sli bridge. I will not be near my pc for the following months so i cannot measure the space between the slots. My mobo is the x99 sabertooth:bang::
...........is it the 3 slot or 4?

 

3 slot for the Nvidia one and 1 slot for the EVGA one. The companies use different measuring standards.

See here for reference: http://forums.guru3d.com/showpost.php?p=5344748&postcount=4

 

http://forums.evga.com/download.axd?file=0;2500811

Pay attention to the mm measurement.