Asus RS700D-E6/PS8 - Manual (Page 50)

Chapter 4: Motherboard information 4-12
6. BMC header (BMC_FW1)
The BMC connector on the motherboard supports an ASUS ® Server
Management Board 4 Series (ASMB4).
7. Power Supply SMBus connectors (6-1 pin JP1, JP2)
These connectors allow you to connect SMBus (System Management Bus) to
the power supply unit to read PSU information. Devices communicate with an
SMBus host and/or other SMBus devices using the SMBus interface.