We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Green circuit board with four RJ45 ports and low-profile bracket

C&N

C&N TXA197 Quad-Port 2.5GBase-T PCIe Network Card

SKU CH-8CEF-JRSPG

Adds four 2.5GbE RJ45 ports via PCIe 3.0 using a Realtek RTL8125B controller with Wake-on-LAN and IEEE 802.3bz support

  • StandardsFast Ethernet
  • Speed2.5 gigabytes_per_second
  • ConnectorsFast Ethernet
  • Interfacepci_express_3.0
  • BUSpci_express_3.0
  • Featuresdesktop
  • Adds four 2.5GbE ports over a single PCIe 3.0 slot
  • Works at 2.5G, 1G, 100M and 10M without new cabling
  • Realtek RTL8125B controller supports IEEE 802.3bz and IEEE 802.3az
  • Wake-on-LAN and RealWow remote wake-up for managed power control
  • Low-profile bracket fits compact desktop and server chassis

Four-Port 2.5GBase-T Adapter

The C&N TXA197 adds four 2.5GBase-T RJ45 ports to a desktop or server through a single PCI Express 3.0 slot. It uses the Realtek RTL8125B controller to deliver 2.5Gbps, 1Gbps, 100Mbps and 10Mbps speeds over existing Cat5e or Cat3 cabling. The half-height bracket fits low-profile chassis and the card supports PXE boot for Windows, Linux and macOS environments.

Thermals and Power in Normal Use

The RTL8125B chipset complies with IEEE 802.3az Energy Efficient Ethernet and the PCIe 2.1 interface for reduced idle power. Auxiliary power auto-detection configures the PCI power management registers automatically. Wake-on-LAN and RealWow remote wake-up let administrators power systems on or off without extra cabling or active cooling requirements.

Behaviour Under Sustained Load

Hardware ECC and CRC engines protect data integrity during continuous multi-gigabit throughput across all four ports. IEEE 1588v1, 1588v2 and 802.1AS time synchronisation maintain deterministic latency for real-time applications. Credit-based shaping per IEEE 802.1Qav and ECMA-393 ProxZzzy sleep support keep performance stable during prolonged traffic bursts rather than short benchmarks.

Highlights

  • Adds four 2.5GbE ports over a single PCIe 3.0 slot
  • Works at 2.5G, 1G, 100M and 10M without new cabling
  • Realtek RTL8125B controller supports IEEE 802.3bz and IEEE 802.3az
  • Wake-on-LAN and RealWow remote wake-up for managed power control
  • Low-profile bracket fits compact desktop and server chassis

Specifications

BrandC&N
ModelTXA197
Part NumberTXA197
StandardsFast Ethernet
Speed2.5 gigabytes_per_second
ConnectorsFast Ethernet
Interfacepci_express_3.0
BUSpci_express_3.0
Featuresdesktop
Dimensions130.0 in x 67.0 in x 18.0 in
Weight87 grams

Questions about this item

How do I install the TXA197 into a PCIe 3.0 slot and which bracket do I use for a low-profile chassis?

Insert the card into any PCIe 3.0 x4 or wider slot, secure the included low-profile bracket with the two screws provided, then attach the four RJ45 cables; the step most people miss is enabling the PCIe 2.1 link speed in BIOS so the RTL8125B negotiates 2.5 Gbps instead of falling back to 1 Gbps.

What maintenance or replacement will the TXA197 need over time?

The card has no moving parts or user-serviceable components; keep the RJ45 ports dust-free and verify driver updates for Windows, Linux or macOS periodically — if a port fails, the entire adapter must be replaced.

What limit appears first when all four ports run sustained 2.5 Gbps traffic?

The PCIe 2.1 x1 electrical link caps aggregate throughput at roughly 500 MB/s, so simultaneous 2.5 Gbps streams on all four ports will saturate the bus before the RTL8125B controller reaches its own thermal ceiling.

Also in this aisle

People compared these

Same shelf, same checkout — eight coins and a 30-minute rate lock.