NEC Express5800 series User Manual page 29

Support for a 3-slot PCI riser card
Support for both full length and low profile PCI cards
Riser C provides the following features:
Bus speed up to 100 MHz
184 pin, 5 volt keyed, 64-bit expansion slot connector
Support for a 3-slot PCI riser card
Support for only low profile PCI cards
Video
NOT USED ON A NAS SERVER
SCSI Controller
The SCSI version of the server board includes an embedded Adaptec AIC-7902 controller
providing dual Ultra320 Low Voltage Differential (LVD) SCSI channels.
The SCSI bus is terminated on the server board with active terminators that cannot be disabled.
The onboard device must always be at one end of the bus. The device at the other end of the
cable must also be terminated. LVD devices generally do not have termination built-in and
need to have a termination source provided. Non-LVDs devices generally are terminated
through a jumper or resistor pack on the device itself.
System Overview 19