There are 2 models optional, different model with different interface and appearance, please choose suitable model before purchase: 15G RTL8126 Network Card,Support Win7/8/10/11,Linux 2 2.5G RTL8125B Network CardSupport Win7/8/10/11,Linux Product name: 5G network card Applicable network type: fast Ethernet Bus type: PCI-E Main chip: RTL8126 Transmission rate: 10/100/1000M/2.5/5Gbps data rate automatic detection. Full duplex/half duplex: full duplex/half duplex adaptive. Network receiving type: RJ45 Port Type1 RJ45 interface Usage RangeDesktops, Servers, NAS Soft Routers System CompatibilitySupports Windows, Linux, MacOS, and other systems Integrated 10/100/1000M/2.5G transceiver. Supports 2.5G and 1G Lite mode. Auto-Negotiation with Extended Next Page capabilityXNP. Supports PCI Express 2.1. Supports pair swap/polarity/skew correction Configurable MDI port orderingMDI swap for easy PCB layout. Crossover DetectionAuto-Correction. Supports 1-Lane 2.5/5Gbps PCI Express Bus. Embedded OTP memory can replace external EEPROM LAN disable with GPIO pin. Customized LEDs. Controllable LED Blinking Frequency and Duty Cycle. Self-Loopback diagnostic capability. Thermal management. 88-pin QFN Greenpackage. Serial EEPROM. Supports 32Mbytes External Serial Peripheral InterfaceSPI Flash. Supports ECMA-393 ProxZzzy Standard for sleeping hosts. Supports LTRLatency Tolerance Reporting Wake-On-LAN and RealWoW!Technologyremote wake-up support. 2.5GbpsPCI-EGigabitLAN RTL8125Bchip E-sportsdedicated 2.5Ghigh-speednetwork Easytosetup ExpandRJ45portthroughPCI-EslotPCEExpressx1,x4,x8orx16slot Note: Only work with PCI-E SIot, Not for PCI Slot