The ExaNIC HPT is the world's first network interface card capable of timestamping Ethernet packets to sub-nanosecond resolution. Packets can be captured at line rate, with the arrival time of the first bit of each packet recorded with a granularity of 250 picoseconds.

For clients at the forefront of the latency race, this technology provides invaluable new insights. For example, the precise latency of a network device can be determined for each input packet - even for very low latency devices - rather than relying on statistical averages or vendor claims.

The high resolution timestamps can also be used in conjunction with supported PTP software for very tight time synchronization over low-jitter links such as dark fiber. A Pulse-Per-Second (PPS) input/output is available for synchronization of cards within a data center.

The ExaNIC HPT supports the same driver stack as the ExaNIC X10 and can simultaneously be utilised as a standard low latency network card.

Timestamp resolution:
250ps (0.25ns)
Timestamp availability:
all received frames, most recent transmitted frame
Time synchronization:
Host, PTP, optional PPS
PTP stack:
Standard open source stacks supported (LinuxPTP or hardware timestamping branch of ptpd recommended)
PPS input/output:
3.3V LVTTL, software-selectable 50 ohm termination
Form factor:
Half-height PCI Express card
2 SFP+, PPS in/out
Data rate:
10 Gigabit Ethernet, 1 Gigabit Ethernet, 100M Ethernet
Supported media:
Fiber (10GBASE-SR, 10GBASE-LR, 1000BASE-SX, 1000BASE-LX), SFP+ Direct Attach
Host interface:
PCIe x8 Gen 3.0 @ 8.0 GT/s per lane
Operating system:
Linux (any distribution)
Typical latency, raw frames:
60 bytes: 780ns
300 bytes: 1μs
Typical latency, raw frames with pre-loaded TX buffer:
60 bytes: 710ns
300 bytes: 930ns
Typical latency, UDP:
14 bytes: 880ns
300 bytes: 1.2μs
Typical latency, TCP:
14 bytes: 930ns
300 bytes: 1.2μs
Flow steering and flow hashing
128 IP rules per port, 64 MAC rules per port
Purchase includes 1 year support and warranty, extended options available