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Green circuit board with silver bracket and single QSFP28 port

DELL

DELL VC496 Mellanox ConnectX-5 VPI CX555A Single Port 100Gb QSFP28 Network Card

SKU CH-3642-F4986

A single-port PCI Express 3.0 x16 network adapter delivering 100 Gbps Ethernet or InfiniBand over QSFP28

  • InterfacePCI-Express
  • Single-port 100 Gbps throughput for high-speed clusters
  • PCIe 3.0 x16 interface delivers low-latency bandwidth
  • VPI design supports Ethernet and InfiniBand fabrics
  • QSFP28 connector enables flexible 100G cabling choices
  • Compliant with IEEE 802.3 and IBTA 1.3 standards

DELL VC496 100Gb QSFP28 Adapter

The DELL VC496 is a single-port Mellanox ConnectX-5 VPI network adapter built for servers and workstations that need 100 Gbps Ethernet or InfiniBand connectivity. It installs in a PCI Express 3.0 x16 slot and supports link speeds of 10, 25, 40, 50 and 100 Gbps over a QSFP28 port. The card handles TCP/IP, UDP/IP and iSCSI transport protocols for storage and compute workloads.

Verify PCIe 3.0 x16 slot and QSFP28 cabling

Confirm the host system provides a free PCI Express 3.0 x16 slot; the adapter is also backward compatible with PCIe 1.1 and 2.0 at reduced bandwidth. A compatible QSFP28 transceiver or direct-attach cable rated for the desired 25, 40, 50 or 100 Gbps link must be sourced separately. Ensure the operating environment can supply adequate airflow for a full-height plug-in card.

Offloads free CPU cycles for high-throughput tasks

Hardware offloads for checksum, segmentation and RDMA reduce host CPU overhead when moving data at line rate across 100 Gigabit Ethernet or InfiniBand fabrics. Supported standards include IEEE 802.3ad LACP, 802.1Q VLAN tagging, 802.1Qbg EVP and IEEE 1588v2 precision time protocol for synchronised clusters. The single-port design leaves additional PCIe lanes available for storage controllers or a second adapter.

Highlights

  • Single-port 100 Gbps throughput for high-speed clusters
  • PCIe 3.0 x16 interface delivers low-latency bandwidth
  • VPI design supports Ethernet and InfiniBand fabrics
  • QSFP28 connector enables flexible 100G cabling choices
  • Compliant with IEEE 802.3 and IBTA 1.3 standards

Specifications

BrandDell
ModelVC496
InterfacePCI-Express

Questions about this item

What comes with the VC496 and do I need to buy a QSFP28 module separately?

The card ships sealed in a plain box without original packaging; a 100 Gbps QSFP28 transceiver or DAC must be purchased separately for the single port.

Should I choose the CX555A for PCIe 3.0 x16 or is there another version?

This VC496 is the CX555A variant with a PCIe 3.0 x16 interface and one 100 Gbps QSFP28 port supporting Ethernet and InfiniBand.

Will the advertised 100 Gbps work at line rate in a PCIe 3.0 x16 slot?

Yes, the x16 Gen 3 link provides enough bandwidth for full 100 Gbps throughput on the single QSFP28 port.

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