User can change hardware MAC address thousands of times


Supports Full Duplex flow control (IEEE 802.3x)

Fully compliant with IEEE 802.3, IEEE 802.3u


Our lowest-priced PCIe adapter, the SD121 is a 10/100 Mbps Ethernet plug-and-play PCI adapter. Firmware allows the user to program the physical MAC address thousands of times. Utilizes the latest chipset technology and provides easy installation. Automatic sensing connects to the network with a RJ-45 connector at the highest negotiable speed. With SD adapters, your computer will turn into a highly-configurable workstation or server.


  • Fully complies with 10/100 IEEE 802.3 specification.

  • Supports Single-lane (or x1) PCI Express specification.

  • One RJ-45 connector supports 100Mbps or 10Mbps data rate auto negotiation.

  • Plug-and-Play installation, auto setup IRQ and I/O address.

  • Supports IEEE 802.3x full-duplex flow control.

  • Compatible with all major operating systems.

  • Supports Wake On LAN (WOL) power management.

  • Full-duplex design to double the performance to 20/200Mbps.

  • Diagnostic LEDs

  • Plug & play
  • Specifications

    Standard IEEE 802.3 10Base-T Ethernet
    IEEE 802.3u 100Base-TX Fast Ethernet
    IEEE 802.3x, IEEE 802.1Q, IEEE 802.1p
    Interface Port PCI Express / Fast Ethernet
    Protocol SNMP v1
    Network Media Ethernet: UTP Cat. 3, 4, 5, EIA/TIA-568 100-ohm STP
    Fast Ethernet: UTP Cat. 5, EIA/TIA-568 100-ohm STP
    Data Transfer Rate Ethernet: 10Mbps/20Mbps (half/full-duplex)
    Fast Ethernet: 100Mbps/200Mbps (half/full-duplex)
    Diagnostic LED Link, Activity
    Temperature Operating:0° C ~ 45° C (32° F ~ 113° F)
    Storage:-10° C ~ 70° C (-14° F ~ 158° F)
    Humidity 5%~95% (non-condensing)
    Certifications CE,FCC