ASrock Rack EPYC3251D4I-2T Server Motherboard - AMD C621 Chipset - Mini ITX

Engineered for compact yet relentlessly capable server deployments, the ASRock Rack EPYC3251D4I-2T Server Motherboard delivers enterprise-grade performance in a small Mini ITX form factor. Built around the AMD C621 chipset and designed to support AMD EPYC processors such as the 3251, this motherboard pairs dense memory capacity with reliable networking and robust ECC/memory support. It is an ideal choice for micro data centers, edge compute nodes, or compact server builds where space, power efficiency, and uptime matter most. With 4 DIMM slots, a maximum memory capacity of 128 GB DDR4 SDRAM, and compatibility with ECC memory and various DDR4 module types, the EPYC3251D4I-2T is engineered to combine performance, data integrity, and efficiency in a tight footprint.

• Compact enterprise-grade design: The Mini ITX motherboard packs server-grade capabilities into a space-saving footprint, enabling flexible deployment in rack towers, edge cabinets, or compact data-center environments. Despite its small size, it sustains demanding workloads by leveraging the AMD C621 chipset and support for high-performance AMD EPYC processors, including the 3251. This combination delivers reliable throughput, scalable memory, and solid I/O while occupying less space than full-size server boards.
• Flexible, memory-dense architecture: Featuring 4 DIMM slots, this board supports DDR4 memory in ECC/UDIMM, RDIMM, and LRDIMM configurations. It enables admins to tailor memory configurations for virtualization, databases, or analytics workloads, while preserving the benefits of error correction. The board supports up to 128 GB of DDR4 SDRAM, with memory speeds up to 2666 MT/s, providing ample bandwidth for multi-threaded workloads and real-time data processing.
• Data integrity at the core: ECC memory support across the supported DIMMs helps detect and correct single-bit memory errors on the fly, reducing the risk of data corruption and downtime in critical applications. For businesses running virtualization platforms, in-memory databases, or continuous analytics, this motherboard’s ECC-ready memory pathway translates to higher uptime, improved reliability, and fewer maintenance windows.
• Reliable networking for server workflows: Equipped with onboard Gigabit Ethernet, the EPYC3251D4I-2T ensures dependable network connectivity for traditional servers, gateway appliances, and edge deployments. This robust networking foundation simplifies cabling, supports standard data center networking practices, and provides a stable backbone for management traffic, storage access, and guest VMs in your infrastructure.
• Designed for scalable server ecosystems: While compact, the EPYC3251D4I-2T is built to integrate smoothly with ASRock Rack’s server ecosystem, offering reliable performance alongside ease of maintenance and upgradeability. The board is engineered for long operational life, with careful attention to power delivery, thermals, and compatibility with a range of server-grade components, enabling smooth scaling as workloads grow or change.

Technical Details of ASRock Rack EPYC3251D4I-2T Server Motherboard

• CPU Support: AMD EPYC 3251 Processor
• Chipset: AMD C621
• Form Factor: Mini ITX
• Memory Architecture: 4 x DIMM slots supporting DDR4 ECC/UDIMM, RDIMM, LRDIMM
• Maximum RAM: 128 GB DDR4 SDRAM
• Memory Speed: Up to 2666 MT/s
• Networking: Gigabit Ethernet onboard
• Memory Types Supported: ECC/UDIMM, RDIMM, LRDIMM

How to install ASRock Rack EPYC3251D4I-2T Server Motherboard

• Prepare your workspace and equipment: power off your system, unplug from power, and ground yourself to prevent static discharge. Have the chassis, screws, and standoffs ready for mounting the motherboard in your server enclosure.
• Install the motherboard into the chassis: align the I/O shield and mounting holes with the chassis standoffs. Secure the board with screws, ensuring there is proper clearance around the CPU socket and memory slots for heat dissipation and maintenance.
• Install the AMD EPYC 3251 processor (or compatible EPYC CPU): carefully place the processor into the socket according to the motherboard manual, secure the locking mechanism, and apply the recommended thermal interface material if the cooler requires it. Attach the CPU cooler and ensure adequate airflow across the motherboard fins and ambient environment.
• Populate memory modules: insert DDR4 ECC/UDIMM, RDIMM, or LRDIMM modules into the four DIMM slots, following the motherboard’s memory population guidelines for optimal dual-channel performance. Ensure each module is firmly seated and locked in place to maintain stable operation.
• Connect power and data cables: attach the PSU power cables (24-pin, 8-pin CPU power as required) and connect data cables for storage devices, plus any PCIe devices. Route cables to maintain airflow and minimize interference with fans or DIMMs.
• Post-assembly BIOS/UEFI configuration: power on and enter the BIOS/UEFI to configure memory settings (e.g., ECC enablement if applicable), boot order, virtualization settings, and any RAID or storage controller configurations. Save changes and reboot to verify system stability.
• Install the operating system or hypervisor: boot from your installation media and install the chosen OS or virtualization platform. After installation, apply drivers and management tools from ASRock Rack to optimize performance, monitoring, and firmware updates for the motherboard and attached components.

Frequently asked questions

• Q: What processors are supported by the ASRock Rack EPYC3251D4I-2T? A: This motherboard is designed to support AMD EPYC processors, including the 3251 family, in conjunction with the AMD C621 chipset. Always consult the latest ASRock Rack compatibility guide for firmware requirements and supported CPU SKUs.
• Q: How much memory can be installed? A: Up to 128 GB of DDR4 SDRAM can be installed across 4 DIMM slots, with support for ECC/UDIMM, RDIMM, and LRDIMM types, at speeds up to 2666 MT/s. This makes it suitable for virtual machines, databases, and edge workloads where memory density matters.
• Q: Is ECC memory supported? A: Yes. The board supports ECC memory configurations when using the appropriate DDR4 DIMMs, helping to detect and correct single-bit memory errors and improve data integrity for mission-critical applications.
• Q: What level of network connectivity does it provide? A: The motherboard includes onboard Gigabit Ethernet, providing reliable wired networking for servers, gateways, and edge devices without requiring additional adapters for basic connectivity.
• Q: What is the form factor and where should I deploy it? A: The EPYC3251D4I-2T uses a Mini ITX form factor, making it ideal for compact server builds, micro data centers, or edge deployments where space is at a premium but a server-class platform is still required.