E810CQDA2: Intel Ethernet Network Adapter E810-CQDA2 Dual-Port 100GbE QSFP28 PCIe 4.0 x16 NIC
Also listed as: E810-CQDA2, E810CQDA2G1P5, E810CQDA2G2P5, 999W87 · made by Intel
The Intel Ethernet Network Adapter E810-CQDA2 provides dual-port 100GbE QSFP28 network throughput across a PCIe 4.0 x16 connection. Engineered for demanding telecommunications workloads (NFV), database synchronization, and high-performance cloud clusters, it integrates RoCEv2/iWARP RDMA, hardware filtering, and up to 100Gbps line rate per port. Second-hand market purchasers should verify optical transceiver link stability, check thermal sensor readings to verify sufficient passive airflow, and confirm that NVM firmware is current.
Specifications
| Part number | E810CQDA2 |
|---|---|
| Brand | Intel |
| Made by | Intel |
| Type | Network adapters |
| Other numbers | E810-CQDA2, E810CQDA2G1P5, E810CQDA2G2P5, 999W87 |
| Status | current |
| Interface | PCIe 4.0 x16 |
| Form factor | PCIe Low Profile |
| Ports | 2x 100GbE QSFP28 |
| Speed | 100GbE |
| Generation fit | PCIe Gen4 enterprise servers |
About the E810CQDA2
E810CQDA2 is Intel's high-performance dual-port 100GbE QSFP28 PCIe 4.0 x16 network adapter in the E810 product family. Providing up to 200Gb/s aggregate bandwidth, it features Intel Dynamic Device Personalization (DDP), ADQ latency optimization, and dual-mode RoCEv2/iWARP RDMA offloads for demanding telecommunications NFV, distributed cloud storage, and AI cluster networking.
Compatibility
Requires an electrical and mechanical PCIe 4.0 x16 slot for full throughput. Features two QSFP28 cages supporting 100GbE optics, active optical cables, and direct attach copper. Configurable for 2x100G, 2x50G, 4x25G, or 8x10G breakout configurations. Requires active server chassis airflow to maintain cool operating temperatures.
How to identify a genuine unit
The low-profile card displays an Intel holographic label showing model E810CQDA2 and part number E810CQDA2G1P5. Two QSFP28 cages are integrated on the rear bracket alongside LED status indicators. In operating systems, the ice driver initializes two 100G network interfaces.
Buying used
Verify that both QSFP28 ports negotiate 100Gbps line rate under traffic load. Inspect the optical cage contacts for cleanliness and check thermal sensor readings to verify proper heatsink mounting. Confirm NVM firmware can be updated cleanly to the latest Intel release.
Reference prices (last 14 days, updated 2026-10-27)
New: USD 720 (1 sighting, Oct 2026)
Used: USD 440 (1 sighting, Oct 2026)
All sightings
| Seller | Condition | Price | Note | Seen |
|---|---|---|---|---|
| serversupply.com | new | USD 720 | 2026-10-27 | |
| ebay.com | used | USD 440 | 2026-10-27 |
Prices seen on public listings on the dates shown, before tax and shipping. Not an offer.
Fits these models
Equivalent part numbers
- Lenovo 4XC7A08277 ThinkSystem Intel E810-CQDA2 100GbE QSFP28 2-Port PCIe Ethernet Adapter
FAQ
Can E810-CQDA2 support 50GbE or 25GbE speeds?
Yes, ports can be configured for 2x100G, 2x50G, 4x25G, or 8x10G breakout configurations.
What driver does the Intel E810 utilize in Linux?
The native in-tree ice driver and irdma RDMA driver.
Buying or selling E810CQDA2?
New, refurbished or used. Tell us the quantity and condition and we connect you with a vetted reseller in your region, usually within one working day.
Sources
- Intel Ethernet Network Adapter E810-CQDA2 Product Brief, checked 2026-10-27