FDR
Rev 1.5
Mellanox Technologies
14
3
FDR
The SwitchX® EVB supports FDR, a pre-standard InfiniBand data rate, where each lane of a 4X
port runs a bit rate of 14.0625Gb/s with a 64b/66b encoding, resulting in an effective bandwidth
of 54.54Gb/s. The FDR physical layer is an IBTA specified physical layer using different block
types, deskew mechanism and framing rules.
SwitchX™ also supports FDR10, a non-standard InfiniBand data rate, where each lane of a 4X
port runs a bit rate of 10.3125Gb/s with a 64b/66b encoding, resulting in an effective bandwidth
of
40Gb/s.
FDR10 supports 20% more bandwidth over regular QDR using the same QSFP cables/connec-
tors.
Both FDR and FDR10 support Forward Error Correction (FEC), as described in IEEE 802.3ap
chapter 74.
FDR10 is only guaranteed to work with approved Mellanox ConnectX-3 adapters.
