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Features and Benefits
Feature
Description
PCI Express
(PCIe)
Uses PCIe Gen 3.0 (8GT/s) and Gen 4.0 (16GT/s) through an x8 or x16 edge connector. Gen 1.1
and 2.0 compatible.
Up to 100
Gigabit
Ethernet
NVIDIA adapters comply with the following IEEE 802.3 standards:
• 100GbE/ 50GbE / 40GbE / 25GbE / 10GbE / 1GbE
• IEEE 802.3bj, 802.3bm 100 Gigabit Ethernet
• IEEE 802.3by, Ethernet Consortium25, 50 Gigabit Ethernet, supporting all FEC modes
• IEEE 802.3ba 40 Gigabit Ethernet
• IEEE 802.3by 25 Gigabit Ethernet
• IEEE 802.3ae 10 Gigabit Ethernet
• IEEE 802.3ap based auto-negotiation and KR startup
• Proprietary Ethernet protocols (20/40GBASE-R2, 50GBASE-R4)
• IEEE 802.3ad, 802.1AX Link Aggregation
• IEEE 802.1Q, 802.1P VLAN tags and priority
• IEEE 802.1Qau (QCN)
• Congestion Notification
• IEEE 802.1Qaz (ETS)
• IEEE 802.1Qbb (PFC)
• IEEE 802.1Qbg
• IEEE 1588v2
• Jumbo frame support (9.6KB)
Memory
EEPROM - The EEPROM capacity is 32Kbit.
FRU I
2
C address is (0x50) and is accessible
through the PCIe SMBus (Note: A
ddress 0x58 is reserved.)
SPI - includes 128Mb SPI Flash device (by WINBOND-NUVOTON).
Overlay
Networks
In order to better scale their networks, data center operators often create overlay networks
that carry traffic from individual virtual machines over logical tunnels in encapsulated formats
such as NVGRE and VXLAN. While this solves network scalability issues, it hides the TCP packet
from the hardware offloading engines, placing higher loads on the host CPU. ConnectX-5
effectively addresses this by providing advanced NVGRE and VXLAN hardware offloading engines
that encapsulate and de-capsulate the overlay protocol.
RDMA and
RDMA
over Conver
ged
Ethernet
(RoCE)
ConnectX-5, utilizing IBTA RDMA (Remote Data Memory Access) and RoCE (RDMA over Converged
Ethernet) technology, delivers low-latency and high-performance over Band and Ethernet
networks. Leveraging data center bridging (DCB) capabilities as well as ConnectX-5 advanced
congestion control hardware mechanisms, RoCE provides efficient low-latency RDMA services
over Layer 2 and Layer 3 networks.
NVIDIA
PeerDirect™
PeerDirect™ communication provides high-efficiency RDMA access by eliminating unnecessary
internal data copies between components on the PCIe bus (for example, from GPU to CPU), and
therefore significantly reduces application run time. ConnectX-5 advanced acceleration
technology enables higher cluster efficiency and scalability to tens of thousands of nodes.
This section describes hardware features and capabilities. Please refer to the relevant
driver and/or firmware release notes for feature availability.
