# ST10000SPEXI — 10GbE PCIe Network Card with Intel X550-AT Chip

> StarTech. com 1ポート10GBase-T増設PCIeイーサネットLANカード Intel X550-AT搭載 NBASE-T対応 5スピード対応 ST10000SPEXI summary. The StarTech. com ST10000SPEXI is a 1-port 10GBase-T PCIe LAN card with Intel X550-AT. Supports NBASE-T (2.5G/5G), jumbo

Tags: network-card, startech, st10000spex, 10gbe, pcie, intel-x550
Source: https://www.amazon.co.jp/dp/B01LN1SQ4Q
Article page: https://web-autoai.com/articles/startechcom-110gbase-tpcielan-intel-x550-at-nbase-t-5?lang=en

Prices and ratings change over time — check the article page for the current values.

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This article covers StarTech. com 1ポート10GBase-T増設PCIeイーサネットLANカード Intel X550-AT搭載 NBASE-T対応 5スピード対応 ST10000SPEXI.

## Overview
The StarTech. com ST10000SPEXI is a single-port 10GBase-T PCIe Ethernet LAN card powered by the Intel X550-AT controller. It supports five speeds—10G, 5G, 2.5G, 1G, and 100 Mbps—via a standard RJ-45 port, enabling NBASE-T connectivity over existing Cat6A cabling. With full-duplex bandwidth up to 20 Gbps, jumbo frame support (9K bytes), and Intel Virtualization Technology for Connectivity (VT-c), this card is a cost-effective way to add 10GbE to a workstation or server. The card comes with a low-profile bracket and is designed for standard PCIe slots (x4 electrical, but compatible with x8/x16). Its red PCB and Intel X550-AT controller make it a reliable choice for both home labs and enterprise environments.

## Connectivity & Compatibility
Be aware that if your PCIe slot is only PCIe 2.0 x4, the maximum theoretical throughput is 2 GB/s (16 Gbps), which is still sufficient for most single-port 10GbE traffic—but full line rate may be constrained under heavy bidirectional load.

## Product Info
Released around 2016, the ST10000SPEXI remains widely available. StarTech offers a 2-year warranty, and drivers can be downloaded from their official website. The package includes the card, a low-profile bracket, and a quick installation guide. Market positioning: This card sits in the mid-to-high range for 10GbE adapters. The Intel X550-AT chip provides superior stability and virtualization features over cheaper Realtek-based cards, while costing less than newer Intel X710 series. It’s a sweet spot for users who need reliable 10GbE without breaking the bank.

## Best Use Cases
NAS / File Server Owners: Upgrading to 10GbE removes network bottlenecks when multiple clients access large files simultaneously. Existing Cat6A cabling works out of the box. Creative Professionals: Video editors handling 4K/8K footage will see dramatically reduced transfer times when moving projects between workstations and storage arrays. Home Lab / Virtualization Enthusiasts: Intel VT-c support enables SR-IOV and VMDq, offloading network processing from the CPU and improving VM performance under heavy traffic. Budget-Conscious 10GbE Adopters: Competes well with other single-port 10GbE cards (e. g. , ASUS XG-C100C) while offering Intel’s reliability and driver support. Ideal for users who want proven performance at a reasonable price. However, if your motherboard only has PCIe 2.0 x1 slots, this card will be seriously bandwidth-limited (500 MB/s effective). Always check available PCIe lane width and version before purchase.

### Product Disclosure (Amazon)
- Manufacturer: StarTech.com(スターテック)
- ASIN: B01LN1SQ4Q
- Note: This article covers a manufacturer-made product based on Amazon listing details.