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Home Networking Networking Accessories StarTech.com ST20000SPEXI Dual-Port 10GBase-T PCIe Ethernet Network Card

StarTech.com ST20000SPEXI Dual-Port 10GBase-T PCIe Ethernet Network Card

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StarTech.com ST20000SPEXI is a dual-port 10GBase-T Ethernet adapter designed to add two high-speed RJ-45 network interfaces to compatible servers, workstations and clients through one PCI Express slot. Powered by the Intel X540 chipset, it supports 10GbE plus 5G, 2.5G, 1G and 100Mbps networks, 9K jumbo frames, VLAN tagging, link aggregation, PXE boot and Intel Virtualization Technology for Connectivity. A low-profile bracket is included for flexible chassis deployment.

OVERVIEW

  • The ST20000SPEXI is a dual-port 10GBase-T PCIe network card for upgrading servers and workstations with two RJ-45 interfaces from a single PCIe slot. Compatibility: Windows 7–11, Windows Server 2012–2022 and Linux; requires PCIe x8 or higher. Model comparison: Dual-port ST20000SPEXI adds two 10GbE connections, unlike single-port adapters. Need: Verify available PCIe slot clearance and OS support before deployment. 

USE CASES

  • 10GbE server upgrades: Adds two 10GbE RJ-45 ports to compatible servers without replacing the existing motherboard networking hardware.
  • High-bandwidth workstations: Provides 10GbE connectivity for professional systems handling large datasets, network storage and high-throughput applications.
  • Storage and NAS connectivity: Supports high-speed Ethernet links between compatible servers, storage systems and network infrastructure.
  • Database servers: Dual ports can provide additional network capacity for demanding database environments and network redundancy architectures.
  • Virtualization hosts: Intel X540 features and virtualization-oriented connectivity capabilities support compatible virtualized server deployments.
  • Network segmentation: Two physical Ethernet interfaces can be assigned to different network roles, subject to the operating system and network architecture.
  • Link aggregation: IEEE 802.3ad support allows compatible network configurations to use link aggregation for increased aggregate connectivity or resilience. 
  • VLAN-enabled infrastructure: IEEE 802.1Q VLAN tagging supports network segmentation in compatible managed-network environments.
  • PXE deployment environments: PXE network boot support can assist IT teams with network-based operating-system provisioning and endpoint deployment. 
  • Legacy Ethernet modernization: Backward network compatibility with 5G, 2.5G, 1G and 100Mbps networks helps organizations transition infrastructure without requiring every connected device to operate at 10GbE immediately.

KEY FEATURES

  • Dual 10GBase-T RJ-45 ports: Adds two 10GbE network interfaces through one PCIe card, increasing network capacity without consuming two separate adapter positions.
  • Intel X540 chipset: Uses Intel's X540 controller platform for enterprise-oriented 10GbE connectivity and advanced networking capabilities. 
  • Up to 20Gbps full-duplex aggregate throughput: Provides up to 10Gbps in each direction per port, delivering up to 20Gbps combined full-duplex bandwidth across the two ports. 
  • Multi-speed Ethernet: Supports 10Gbps, 5Gbps, 2.5Gbps, 1Gbps and 100Mbps networks, allowing deployment into mixed-speed environments. 
  • PCI Express x8 interface: Uses a PCIe x8 connection and requires an available x8-or-higher PCIe slot, providing the host interface needed for dual-port 10GbE operation. 
  • 9K jumbo frames: Supports jumbo frames up to 9,000 bytes, which can reduce packet-processing overhead in compatible high-throughput network environments. 
  • IEEE 802.3ad link aggregation: Supports compatible link-aggregation configurations for increased aggregate network capacity or resilience.
  • IEEE 802.1Q VLAN tagging: Enables compatibility with VLAN-based network segmentation and traffic separation.
  • PXE network boot: Supports network-based boot and provisioning workflows, helping IT teams automate compatible system deployments. 
  • Intel Virtualization Technology for Connectivity: Provides networking features designed for compatible virtualized environments.

TECHNICAL SPECIFICATIONS

  • Brand: StarTech.com
  • Product ID: ST20000SPEXI
  • Product Type: Dual-port 10GBase-T Ethernet PCIe network card
  • Number of Ports: 2
  • Ethernet Interface: RJ-45
  • Ethernet Speed: 10Gbps / 5Gbps / 2.5Gbps / 1Gbps / 100Mbps
  • Maximum Data Transfer Rate: 20Gbps full-duplex; 10Gbps half-duplex
  • Chipset Intel: X540
  • Bus Type: PCI Express
  • PCIe Revision: PCI Express Rev. 2.0
  • PCIe Interface: PCI Express x8
  • Required Slot: PCIe x8 or higher
  • Industry Standards: IEEE 802.3an, IEEE 802.3ab, IEEE 802.3u
  • Link Aggregation: IEEE 802.3ad
  • VLAN: IEEE 802.1Q
  • Jumbo Frame: Up to 9K
  • Auto-MDIX: Yes
  • Full Duplex: Yes
  • Promiscuous Mode: Yes
  • PXE Boot: Yes
  • Virtualization: Intel Virtualization Technology for Connectivity
  • Port Indicators: 2 × Link Speed; 2 × Link Activity
  • Card Profile: Standard profile with low-profile bracket included
  • Connector: 1 × PCIe x8; 2 × RJ-45
  • Supported Operating Systems: Windows 7, 8, 8.1, 10, 11; Windows Server 2012/2016/2019/2022; Linux
  • Compatibility: Windows/Linux systems with available PCIe x8-or-higher slot
  • Product Length: 16.3 cm / 6.4 in
  • Product Width: 20 mm / 0.8 in
  • Product Height: 12.0 cm / 4.7 in
  • Product Weight: 157 g / 5.5 oz
  • Operating Temperature: 5°C to 50°C / 41°F to 122°F
  • Storage Temperature: -20°C to 60°C / -4°F to 140°F
  • Operating Humidity: 20–80% RH
  • UPC: 065030860598
  • TAA Compliant: Yes
  • Package Quantity: 1

Why Choose This Product?

  • Two 10GbE ports from one adapter: Expands network connectivity while using a single PCIe card position.
  • Strong upgrade path: Multi-speed support lets the adapter operate with 10GbE as well as 5G, 2.5G, 1G and 100Mbps infrastructure. 
  • Enterprise-oriented Intel controller: The Intel X540 chipset provides a mature platform for high-speed Ethernet and virtualization-related networking features.
  • High aggregate bandwidth: Up to 20Gbps full-duplex capability suits data-intensive server, workstation and storage workloads.
  • Network-management flexibility: VLAN tagging, link aggregation, PXE and jumbo-frame support address common enterprise networking requirements.
  • Chassis deployment flexibility: The supplied low-profile bracket supports installation in compatible compact-form-factor systems as well as standard-profile chassis.
  • Simplified copper infrastructure: RJ-45 10GBase-T connectivity can integrate with compatible twisted-pair Ethernet infrastructure rather than requiring fiber-only connections.
  • Procurement-ready support: TAA compliance, a 2-year warranty and manufacturer technical support add lifecycle value for business deployments.  

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