Mini-STX motherboard K3921-H mSTX

Intel® Core™ i seriesIntel® Apollo LakeIntel® Core™ i3-N305

Product overview
The Extended Lifecycle mSTX motherboard K3921-H supports Intel® Core™ i3 and Intel® N‑series processors (Alder Lake N, Twin Lake) and integrates Intel® UHD Gen12 graphics (Intel® Xe). It provides dual DisplayPort 1.4, one DisplayPort via front USB‑Type‑C and an onboard eDP V1.4b. The board handles three independent displays up to 2×4K + 1×FHD and includes M.2 Key‑M (PCIe + SATA) and an M.2 slot for WLAN/Bluetooth (PCIe/CNVi). Front USB‑C supports PowerDelivery Sink, USB 3.2 Gen1 and DisplayPort Alternate Mode (DPoC). Designed for Thin Client and compact SMARTCASE™ S501 deployments, all components are qualified for 24/7 operation.

Key highlights

• Support for Intel® Twin Lake processors
• DDR5‑4800 SODIMM support for up to 32 GB
• Intel® UHD Gen12 graphics driven by Intel® Xe (24 EUs)
• Up to 2x DisplayPort 1.4 + 1x DisplayPort via USB‑C (DPoC) + eDP onboard
• M.2 Key‑M (PCIe + SATA) and M.2 Key‑E for WLAN/CNVi
• Designed for fanless operation where applicable

Benefits

• Lifecycle continuity and product maintenance tailored for long‑term projects
• Comprehensive I/O and expansion options for compact systems
• Technical support and update management by Kontron
• Reduced integration effort for Thin Client and compact industrial applications

Technical specifications

• Processor: Intel® Processors N‑series (SoC variants: N100 / i3‑N305 / N355 / N150 depending on SKU)
• Main memory: 1x DDR5‑4800 SODIMM up to 32 GB, non‑ECC
• Graphics: Intel UHD Gen12 (Intel® Xe), 24 EUs
• Display outputs: Up to 2x DisplayPort 1.4 + 1x DisplayPort via front USB‑C (DPoC) + eDP V1.4b (up to 4K)
• Storage/expansion: 1x M.2 Key‑M (PCIe x1 Gen3 + SATA) for NVMe/SATA SSD; 1x M.2 Key‑E (WLAN/CNVi/Bluetooth)
• USB: Multiple USB 2.0 / USB 3.2 Gen1 / Gen2 ports; front USB‑C with PD Sink and DPoC
• Ethernet: Gigabit (Realtek RTL8111H)
• Audio: Realtek ALC256 HD codec
• SATA: 1x SATA III (6 Gbit/s)
• Power: External/Internal DC‑In options; USB‑C PD Sink (up to 20V/100W)
• BIOS: AMI Aptio 5.x (UEFI)
• Form factor: Mini‑STX (140 × 148 mm)
• Operating conditions: 0 °C–50 °C; 5%–85% RH
• Certifications: Planned cTÜVus (IEC62368‑1), CE Class B, UKCA, FCC‑B verification