Asus RS500A-X6/PS4 - Manual (Page 38)

Chapter 2: Hardware setup 2-20
The heatsink on PIKE 1078/PIKE 2008 Series might interfere the components
on the expansion card. Ensure that the height of the components is less than
5.8 mm.
9. Set the SGPIO_SEL1 jumper on
the backplane to pin 2-3 when
connecting data cables to the SAS
connectors on the motherboard.
Installing i Button (for PIKE 1078 only)
Follow the steps below to install an optional i Button on your motherboard.
1. Locate the i Button slot on the
motherboard.
2. Snap the i Button in place.