Chelsio T520-CR 10 Gigabit Ethernet Adapter Card - Part ID: T520-CR

SKU: T520-CR
Manufacturer: Chelsio
2-port Low Profile 1/10GbE UWire Adapter with PCIe 3.0 x8, 32K conn. Direct Attach More details...
Price: $495.00
Save to my Wish List
Chelsio T520-CR 10 Gigabit Ethernet Adapter Card - Part ID: T520-CR
Chelsio T520-CR 10 Gigabit Ethernet Adapter Card - Part ID: T520-CR
Product Details
High Performance, Dual Port 10GbE Unified Wire Adapter
Enables TCP, UDP, ISCSI, iWARP and FCoE Offload over Single Unified Wire with SR-IOV, EVB/VNTag, DCB

Chelsio’s T520-CR is a dual port 10 Gigabit Ethernet Unified Wire adapter with PCI Express 3 host bus interface, optimized for cloud computing, HPC, virtualization, storage, and other data center applications.

The fifth-generation (T5) technology from Chelsio provides the highest 10GbE performance available and dramatically lowers host-system CPU communications overhead with on-board hardware that off-loads TCP/IP, iSCSI, FCoE and iWARP RDMA processing from its host system. T520-CR frees up host CPU cycles for useful applications. The system achieves increased bandwidth, lower latency, and uses less power.

The Unified Wire Solution
With the T520-CR, Chelsio is enabling a unified wire for LAN, SAN, and cluster traffic. This unified wire was made possible by the high bandwidth and low latency of 10GbE combined with storage and cluster protocols operating over TCP/IP (iSCSI, FCoE, and iWARP respectively). In parallel, operating systems and hypervisors have incorporated native support for iSCSI and database applications are now supporting file-based storage protocols such as NFS as an alternative to SANs.

T520-CR includes a full-fledged integrated Traffic Manager for robust flow control, traffic management, and QoS.

Fibre Channel over Ethernet (FCoE) provides a transition path from legacy SANs to converged networks. Expanding its unified wire approach, Chelsio has added FCoE hardware support for the adapter.

The adapter’s two ports and IEEE 802.3ad link aggregation/failover features are ideal for critical network applications that require redundancy and high-availability capabilities.

T520-CR Ethernet-only networking reduces the data center’s cost in network adapters, cables, switches, rack space, power, equipment spares, management tools, planning, networking skills and installation.

  • PCI Express Gen3 x8
  • Low Latency
  • Supports Up to 1M Connections
  • Full TCP and UDP offload
  • Full iSCSI, FCoE offload
  • Full iWARP RDMA offload
  • Full NAT offload
  • EVB, Flex10, VNTag
  • Integrated media streaming offload
  • HW based firewall in the cloud
  • Traffic filtering & management
  • Software Compatible with T4

Data-Center Networking
  • Scale up servers and NAS systems
  • Link servers in multiple facilities to synchronize data centers
  • Consolidate LAN, SAN, and cluster networks
Cloud Computing
  • Virtualization features to maximize cloud scaling and utilization
  • Runs InfiniBand, Fibre Channel apps unmodified on Ethernet
  • Cloud ready functional and management features
  • QoS and Traffic management
Networked Storage
  • Enable high performance NAS systems and Ethernet-based IP SANs
  • Develop shared-storage systems providing both file- and block-level services
High Performance Computing
  • Very low latency Ethernet
  • Increase cluster fabric bandwidth
  • Deploy Ethernet-only networking for cluster fabric, LAN, and SAN


Host Interface
  • PCI Express Gen 3 x8
  • MSI-X, MSI and support for legacy pin interrupts
High Performance RDMA
  • Low latency and line rate bandwidth
  • Enhanced RDMA primitives
  • iWARP support on Linux OFED
  • Support for Atomics and Immediate Data
  • Microsoft Network Direct support
  • Supported Transport for SMB-Direct in Microsoft Windows Server 2012
UDP/IP & Multicast Offload
  • UDP Sockets API
  • Low user-to-user latency
  • Multicast replication on ingress or egress
  • 128 Virtual and 8 Physical functions
  • 144 port virtual switch
  • EVB, VEPA, Flex10, VNTag
  • 512 virtual MAC addresses
  • Offload 802.1 Qbg/h
  • Full HBA FCoE (Initiator or Target)
  • Open-FCoE Offload (Initiator)
  • CRC32 offload generation & verification
  • Ingress & Egress ACL (Access Control List)
  • T10 DIF/DIX support
  • Full iSCSI initiator and target mode stack
  • CRC32 offload generation & verification
  • iSCSI proxy switching based on SCSI CDB
  • Full HBA offload
  • T10 DIF/DIX support
TCP/IP Full Offload
  • Full TCP implementation including IPv4 & IPv6
  • Extensive RFC compliance, fully featured stack
  • Full TCP Proxy between any set of connections
  • VLAN support up to 4096 VLAN IDs
  • Load balancing and Fail-over capabilities
Stateless Offloads
  • TCP/UDP checksum offload for IPv4 & IPv6
  • TSO, LSO, and GSO for IPv4 & IPv6
  • VLAN filtering, insertion & extraction
  • Line rate packet filtering and attack protection
  • Fine granularity time stamping (down to 2ns)
  • Ethernet Routing (packet header rewrite)
  • Packet Tracing and Packet Sniffing
  • IEEE 802.3ae (10 GbE)
  • IEEE 802.3az (Energy Efficient Ethernet)
  • IEEE 802.3z (1 GbE)
  • IEEE 802.1P priority
  • IEEE 802.1Q VLAN tagging
  • IEEE 802.1Qbg EVB/VEPA
  • IEEE 802.Qhn VNTag
  • IEEE 802.3x flow control
  • IEEE 802.3ad load-balancing and failover
  • Ether II and 802.e encapsulated frames
  • Multiple MAC addresses per interface
  • Jumbo Frames up to 9.6Kbytes
Physical and Environmental
  • Dimensions without bracket: 6.6 in. x 2.7 in. or 16.76 cm x 6.88 cm
  • Operating Temp: 0 to 55ºC or 32 to 131ºF
  • Operating Humidity: 5 to 95%
  • Airflow: 200 lf/m

  • 1-year limited hardware warranty – free repair or replacement for faulty hardware due to Chelsio defect or failure.
  • Extended warranty to 3 years can be purchased within first year.
  • 30 days free technical support, software maintenance & upgrades with the purchase of any Chelsio adapter or software product.

Ordering Info

Model: T520-CR
Physical Interface: 10GBASE-SR or LR*
Connector: LC Duplex
Media: MMF or SMF


SM10G-SR: 10G short-reach SFP+ optic module
SM10G-LR: 10G long-reach SFP+ optic module
SRCABLE3M: Fiber optic cable, 10GBASE-SR, 3M
LRCABLE3M: Fiber optic cable, 10GBASE-LR, 3M
TAPCABLE1M: Twinax passive cable, 1M
TAPCABLE3M: Twinax passive cable, 3M
TAPCABLE5M: Twinax passive cable, 5M

* SFP+ optics sold separately. Only Chelsio-supplied modules may be used

Previous Item   Next Item

Customer Account:

Talk to Us for all your questions / RFQs

Recently Viewed Products