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Intel 100Gb QSFP28 Dual-Port PCI Express 4.0 x16 Ethernet Network Adapter - E810-CQDA2

Intel 100Gb QSFP28 Dual-Port PCI Express 4.0 x16 Ethernet Network Adapter - E810-CQDA2

Part Number: E810-CQDA2
Manufacturer: Intel

Condition: Refurbished

Weight: 5.0 lbs

Availability: In stock

Regular price $723.99
Regular price Sale price $723.99
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Intel E810-CQDA2 100GbE Dual-Port QSFP28 PCIe 4.0 x16 Network Adapter

The Intel E810-CQDA2 is a dual-port 100GbE QSFP28 Ethernet network adapter built on the Intel Ethernet 800 Series controller. With a PCIe 4.0 x16 host interface it delivers ultra-high-bandwidth low-latency 100GbE connectivity for enterprise data centers storage networking and high-performance computing environments requiring maximum network throughput per slot.

Key Features

  • 2x QSFP28 ports — 100GbE per port
  • PCIe 4.0 x16 host interface — maximum bandwidth server connectivity
  • Intel Ethernet 800 Series controller (E810)
  • Support for RDMA (iWARP and RoCEv2) for low-latency workloads
  • SR-IOV for high-density virtualization
  • Intel Dynamic Device Personalization (DDP) support
  • Standard retail variant

Product Specifications

  • Part Number: E810-CQDA2
  • Manufacturer: Intel
  • OEM Status: Genuine Intel (retail)
  • Controller: Intel Ethernet 800 Series (E810)
  • Ports: 2x QSFP28
  • Port Speed: 100GbE
  • Host Interface: PCIe 4.0 x16

Interface Specifications

  • Host Interface: PCI Express 4.0 x16
  • Port Type: QSFP28 (2x)
  • Supported Speeds: 100GbE, 40GbE, 25GbE, 10GbE
  • RDMA: iWARP, RoCEv2
  • Virtualization: SR-IOV

Port Specifications

  • Total Ports: 2
  • Connector: QSFP28
  • Max Speed per Port: 100Gbps
  • Aggregate Bandwidth: Up to 200Gbps
  • Cable Support: DAC, AOC, optical transceivers

Use Cases

  • 100GbE server connectivity in high-performance data centers
  • Storage networking (NVMe-oF) requiring maximum bandwidth
  • RDMA workloads (HPC, AI/ML, distributed storage) via RoCEv2 or iWARP
  • High-density virtualization leveraging SR-IOV
  • Network function virtualization (NFV) requiring 100GbE throughput

Compatibility

  • PCIe 4.0 x16 slot — backward compatible with PCIe 3.0 x16
  • Supported on Linux, Windows Server, VMware ESXi
  • Works with QSFP28 DAC cables, AOC cables, and optical transceivers
  • Compatible with 100GbE top-of-rack switches

Frequently Asked Questions

What is the difference between E810-CQDA2 and E810CQDA2BLK?
E810-CQDA2 is the standard retail part number while E810CQDA2BLK is the boxed retail variant. Both use the same Intel E810 controller with identical specifications.
Does this support RDMA?
Yes it supports both RoCEv2 and iWARP RDMA protocols for low-latency CPU-bypass networking.
What is the difference between E810-CQDA2 and E810CQDA2G2P5?
E810CQDA2G2P5 is an OEM variant while E810-CQDA2 is the standard Intel retail part. Both are based on the same E810 controller with identical performance specifications.

The Intel E810-CQDA2 delivers dual-port 100GbE QSFP28 connectivity via PCIe 4.0 x16 — purpose-built for enterprise data centers requiring maximum 100GbE throughput with RDMA SR-IOV and Intel DDP capabilities.

Frequently Asked Questions

Why do I see an incorrect image for this item?

Images may be representative of the product model. For Refurbished items, the actual unit may differ in appearance from the image shown.

Specifications, part number, condition and included accessories are stated on this page.

What do you mean by term Refurbished?

Refurbished means a used computer part or device that has been cleaned, checked, and repaired to make sure it works properly again. Unlike regular second-hand items, refurbished products go through testing and fixing so they can perform like new.

How many days does it take to ship goods to customers?

All orders are processed within 1-2 business days. Orders placed on weekends or public holidays will be processed on the next business day. For more info visit shipping policy.

What is your return policy?

We offer a 30-day return policy subject to the terms and conditions described in our Refund Policy. Restocking fees may apply to eligible non-faulty returns. Kindly take a look at our Return Policy page.

Do you deliver my ordered items in their original retail box?

For Brand New items, you will receive them in their original retail box. For Refurbished items, you will receive them in a Brown Box or Bulk Packaging.

Do your printers come with ink cartridges?

Refurbished printers do not come with ink cartridges or toners.