Kontron K3881-C Micro-ATX Intel Xeon E2400/6300 C266 2x10Gbe

The K3881-C breaks away from ordinary micro-ATX boards by pairing Intel's latest Xeon E-2400 processors with a C266 chipset and dual integrated 10-Gigabit Ethernet—a combination rarely found on a compact 244 x 244 mm footprint. Built for edge servers, network appliances, and small business infrastructure, it delivers workstation-class performance without sacrificing expansion flexibility or remote manageability.

Highlights

• Supports Intel Xeon E-2400 and E-2300 series, plus Pentium and Celeron LGA1200 CPUs
• Intel C266 chipset with ECC DDR4 memory up to 128 GB across four UDIMM slots
• Dual 10GbE RJ45 ports via Intel X710-AT2 controller for high-speed networking
• PCIe 4.0 x16 slot, PCIe 3.0 x4 (in x16), and PCIe 3.0 x1 for flexible expansion
• Dual M.2 slots with PCIe Gen4 x4 NVMe support for fast storage
• Triple display outputs: DisplayPort, HDMI, and VGA
• TPM 2.0 header for hardware-based security

In daily use

Deploying the K3881-C as a compact server or network gateway is straightforward. The board's six SATA 6Gb/s ports and two M.2 NVMe slots accommodate mixed storage needs, while the 10GbE ports eliminate bottlenecks for virtualization, NAS, or firewall duties. Four rear USB ports (two 3.2 Gen 2, two 3.2 Gen 1) and two USB 2.0 handle peripherals, and the integrated Intel UHD Graphics (via CPU) drives up to three displays for local management. The 24-pin ATX and 8-pin EPS power connectors ensure compatibility with standard power supplies, and the board's micro-ATX form factor fits into space-constrained chassis without compromising on features.

Full specifications

• Form factor: Micro-ATX (244 x 244 mm)
• CPU socket: LGA 1200
• Supported processors: Intel Xeon E-2400 series, Xeon E-2300 series, Pentium, Celeron
• Chipset: Intel C266
• Memory: 4x DDR4 ECC UDIMM, up to 128 GB, 3200 MHz
• Networking: 2x 10 Gigabit Ethernet RJ45 (Intel X710-AT2)
• Expansion slots: 1x PCIe 4.0 x16, 1x PCIe 3.0 x4 (in x16 slot), 1x PCIe 3.0 x1
• Storage: 6x SATA 6Gb/s, 2x M.2 (PCIe Gen4 x4, NVMe)
• Rear USB: 2x USB 3.2 Gen 2 Type-A, 2x USB 3.2 Gen 1 Type-A, 2x USB 2.0
• Video outputs: 1x DisplayPort, 1x HDMI, 1x VGA
• Audio: Realtek ALC888S codec
• Security: TPM 2.0 header
• Power connectors: 1x 24-pin ATX, 1x 8-pin EPS
• OS support: Windows 10/11, Windows Server, Linux

Final note

The K3881-C is a future-ready platform for businesses that need server-grade reliability, high-speed networking, and compact dimensions—all backed by Kontron's industrial heritage.