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Green PCB network card with four RJ45 ports and full-height bracket

Intel

Intel EXPI9024PTBLK PCI Express x4 Quad Port Bypass network card

SKU CH-1CP4-6613F MPN EXPI9024PTBLK

Four-port Gigabit Ethernet adapter with PCIe x4 interface and programmable bypass relays for inline network appliances

  • StandardsIEEE 802.3ab
  • Speed10/100/1000Mbps
  • Connectors4 x RJ45
  • InterfacePCI Express x4
  • FeaturesIntel I/O Acceleration Technology provides TCP/IP accelerati
  • Four Gigabit ports for high-density inline appliances
  • PCI Express x4 interface delivers high throughput for server workloads
  • Mechanical bypass relays maintain traffic flow during power loss
  • Intel I/O Acceleration Technology offloads TCP/IP processing from the CPU
  • IEEE 802.3ab compliance ensures broad network compatibility

Quad-port bypass server adapter

The Intel EXPI9024PTBLK is a PCI Express x4 network card with four RJ45 ports that operate at 10, 100 or 1000 Mbps. It is built for inline appliances such as intrusion prevention systems that must stay in the data path. The bypass function uses mechanical relays to keep traffic flowing if the host loses power or the watchdog timer expires. Open source reference drivers are provided for custom appliance software.

Sustained inline throughput

Intel I/O Acceleration Technology offloads TCP/IP processing to reduce CPU overhead during continuous packet inspection. The PCI Express x4 interface supplies enough bus bandwidth for all four gigabit links to run at line rate simultaneously. Bypass state can be switched in real time without interrupting the traffic stream, so failover does not add latency spikes. The card is designed for 24/7 inline operation rather than burst workloads.

Mechanical relay bypass and mounting

Four RJ45 connectors sit on a standard low-profile bracket for rackmount chassis. The relays provide a fail-open or fail-closed path that is purely physical, so network continuity does not depend on driver or firmware state. A watchdog timer can trigger bypass automatically if the appliance software hangs. The adapter targets equipment manufacturers building dedicated inline platforms, not general-purpose servers.

Highlights

  • Four Gigabit ports for high-density inline appliances
  • PCI Express x4 interface delivers high throughput for server workloads
  • Mechanical bypass relays maintain traffic flow during power loss
  • Intel I/O Acceleration Technology offloads TCP/IP processing from the CPU
  • IEEE 802.3ab compliance ensures broad network compatibility

Specifications

BrandIntel
ModelEXPI9024PTBLK
StandardsIEEE 802.3ab
Speed10/100/1000Mbps
Connectors4 x RJ45
InterfacePCI Express x4
FeaturesIntel I/O Acceleration Technology provides TCP/IP acceleration
Programmable bypass mode with mechanical relays
– Fail-open or close upon power failure detect and watch dog timer
– Real time control of bypass mode
Bypass Mode: Network packets flow in and out of the adapter ports unattended, allowing inline appliances to go down without compromising the flow of network traffic
OS Support: Linux and FreeBSD OS support reference drivers
FreeBSD: sysctrl
Shipping weight2.94 kg
Package size406 × 254 × 203 mm

Questions about this item

Does the PCI Express x4 card run hot or draw noticeable power when all four ports run at 1000Mbps all day?

The adapter uses the PCI Express x4 bus for high throughput and Intel I/O Acceleration Technology to offload TCP/IP work, keeping CPU load and heat low during sustained 10/100/1000Mbps traffic.

What must my server already have so the four RJ45 ports and bypass relays function?

A free PCI Express x4 slot and an operating system that can load the open-source reference drivers Intel provides for the EXPI9024PTBLK.

Will the mechanical bypass relays stay open if I keep an older 10/100Mbps switch on the other side?

Yes — the relays fail-open on power loss or watchdog timeout regardless of link speed, so 10, 100 or 1000Mbps legacy links remain connected.

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