The ExaNIC X4 also has built in port mirroring and bridging functionality, both useful features that are not available in other NICs. Additionally, with hardware–based time stamping of every packet to 6 nanoseconds resolution, users can rethink their approach to measurement and latency management.

The ExaNIC is also available in a two-port half-height version (ExaNIC X2); both cards share the same internal architecture and performance.


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Model Number


Typical latency, raw frames

  • 60 bytes: 950ns
  • 300 bytes: 1.2μs

Typical latency, UDP

  • 12 bytes: 1.1μs
  • 300 bytes: 1.4μs

Typical Latency, TCP

  • 12 bytes: 1.1μs
  • 300 bytes: 1.4μs

Form factor

Full-height PCI Express card


4 SFP+, PPS and power

Data rates

10 Gigabit Ethernet, 1 Gigabit Ethernet, 100M Ethernet

Supported Media

Fiber (10GBASE-SR, 10GBASE-LR, 1000BASE-SX, 1000BASE-LX), Copper (1000BASE-T), SFP+ Direct Attach

Host Interface

PCIe x8 Gen 2.0 @ 5.0 GT/s per lane

Operating Systems

Linux (any distribution)

Timestamp resolution


Timestamp availability

all received frames, most recent transmitted frame

Time synchronization

Host, PTP, optional PPS

PPS input

RS-422, RS-232, TTL


Optional forwarding between ports 1 and 2, latency <170ns

Port mirroring

Ports 1-3 transmit/receive individually selectable for mirroring to port 4

Flow steering and flow hashing

128 IP rules per port, 64 MAC rules per port

Backup power input

12V DC

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