STARTECH PEXUSB3S25 2 Port PCI Express USB 3.0 Expansion Card
- 2x USB Ports
- USB 3.0
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Dual 10 GbE RJ45 ports on a PCIe 2.1 x8 card with Intel X540 controller, low-profile bracket included
The Alphacool Intel X540-T2 adds two 10 GbE copper ports to a server or workstation through a PCIe x8 slot. It targets administrators who need 10 GbE over existing Cat 6a cabling up to 100 m or Cat 6 up to 55 m. The card includes both low-profile and full-height brackets for flexible chassis fit.
The adapter uses a PCIe 2.1 link at 5.0 GT/s with x8 electrical width, also compatible with x16 slots. On the wire side the on-chip PHY negotiates 10 GbE, 1 GbE or 100 Mb/s over twisted pair. Jumbo frames up to 15.5 KB are supported, as are 802.1Q VLANs and Data Center Bridging. The card operates from 0 °C to 55 °C and does not support hot-swap insertion.
Dual ports give redundancy or link aggregation for storage traffic such as iSCSI, FCoE or NFS. A single 10 GbE lane saturates near 10 Gb/s, so sustained sequential workloads will hit the wire-rate ceiling. Workloads needing more than two 10 GbE links or fibre media require additional adapters.
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| Product | |
|---|---|
| Brand name | Intel |
| Product line | X540-T2 |
| Model name | X540-T2 |
| Product type | PCI Express to Ethernet Port Card |
| Processor | |
| Cache size/speed | Not applicable – the Intel X540T2 is a network adapter and does not have a cache. |
| Ports & slots | |
| External USB ports | None – this is a PCIe network adapter, no USB ports available. |
| Internal USB ports | None – this is a PCIe network adapter, no USB ports available. |
| External 1394 ports | None – this is a PCIe network adapter, no USB ports available. |
| Internal 1394 ports | None – this is a PCIe network adapter, no USB ports available. |
| External connectors | 2 x RJ-45 |
| Size & build | |
| Product dimensions | 6.65 × 4.37 × 1.18 in |
| Product weight | 0.75 lb (0.34 kg) |
| Compatibility | |
| Supported operating systems | Windows 7–11 (64-bit), Windows Server 2008–2022, Linux distributions with ixgbe driver, VMware ESXi 5.x–7.x |
| Compatible with | Supports Windows 7–11 (64-bit), Windows Server 2008–2022, Linux distributions with ixgbe driver, and VMware ESXi 5.x–7.x; requires PCIe x8 or higher slot. |
| In the box | |
| In the box | Intel X540T2 Dual-Port 10GBase-T Ethernet Adapter, Low-Profile and High-Profile |
Both brackets are included — use the high-profile bracket for standard ATX cases and the low-profile bracket for small-form-factor or 1U servers.
The card delivers up to 10 Gbps per port over Cat6a cable up to 100 m, or Cat6 up to 55 m, with jumbo frames up to 15.5 KB for lower CPU overhead.
The x8 lane at 5.0 GT/s provides enough bandwidth for dual 10 GbE line-rate traffic, so the interface does not cap performance.
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