ASRock Rack EP2C621D12 WS Server Motherboard – Intel C621 Chipset, Socket P LGA-3647, SSI EEB

The ASRock Rack EP2C621D12 WS is a premium server-grade motherboard engineered for data centers, virtualization stacks, and enterprise workloads that demand robust multi-processor performance, expansive memory capacity, and dependable uptime. Built around the Intel C621 chipset and designed in the SSI EEB form factor, this motherboard unlocks the full potential of 2nd Gen Intel Xeon Scalable processors, delivering the reliability and scalability required for mission-critical applications. With dual Socket P LGA-3647 sockets, 12 DIMM slots, and a versatile memory ecosystem, the EP2C621D12 WS enables administrators to optimize for virtualization density, memory-intensive workloads, and infrastructure-as-a-service deployments. Its thoughtful layout and server-focused features are tailored for rack deployments, making it a strong foundation for private clouds, data-intensive databases, and high-availability workloads that keep businesses online around the clock.

• Dual-socket Xeon performance for scalable workloads: The EP2C621D12 WS supports dual Socket P LGA-3647 sockets and 2nd Gen Intel Xeon Scalable processors, delivering extraordinary multi-core performance and memory bandwidth. This design is ideal for virtualization hosts, database servers, and compute-heavy applications where consolidation and performance per watt matter most. With two CPUs in play, operations such as live migration, in-memory processing, and complex analytics can run more smoothly, reducing bottlenecks and accelerating service delivery across the enterprise.
• Generous DDR4 memory with 12 DIMM slots: Equipped with 12 memory slots, the board supports DDR4 SDRAM with a total capacity up to 64 GB. It accommodates a range of memory configurations, including standard DIMMs, LRDIMMs, and NVDIMMs, offering administrators the flexibility to tailor memory to workload requirements—from virtualized desktops and dense databases to large-scale in-memory computing. The broad memory compatibility helps optimize latency and throughput for small to medium virtualization farms and big-data analytics environments alike.
• Enterprise-ready form factor and chipset: Built on the Intel C621 chipset and packaged in the SSI EEB form factor (12" x 13"), this motherboard is purpose-built for rackservers and dense deployments. The SSI EEB footprint ensures robust power delivery, signal integrity, and airflow characteristics essential for 24/7 operation in data centers. The combination of chipset and form factor supports a broad ecosystem of server components, making it easier to pair with compatible chassis, storage controllers, and I/O expansion options for scalable architectures.
• Reliable networking and core I/O for data center workloads: With onboard Gigabit Ethernet and server-grade I/O capabilities, the EP2C621D12 WS provides dependable network connectivity that underpins virtualization hosts, storage gateways, and application servers. This foundation supports reliable data transfer, remote management, and consistent service delivery. The motherboard’s design also lends itself to expansion through compatible PCIe resources and storage interfaces, enabling administrators to tailor networking and storage topologies to workload demands without compromising reliability.
• Enterprise-grade reliability and future-proofing: ASRock Rack designs its server motherboards for demanding environments, prioritizing long-term availability, robust power delivery, and compatibility with enterprise software ecosystems. The EP2C621D12 WS is built to handle continuous operation, virtualization workloads, and mission-critical services, offering administrators a stable platform that scales with business growth and evolving infrastructure requirements. This makes it an attractive choice for private cloud deployments, virtualization clusters, and workloads that require consistent uptime and predictable performance.

Technical Details of ASRock Rack EP2C621D12 WS Server Motherboard

• Form Factor: SSI EEB (12" x 13")
• Chipset: Intel C621
• CPU Sockets: Dual Socket P LGA-3647
• Processors Supported: 2nd Gen Intel Xeon Scalable Processors
• Memory: 12 x DIMM slots, DDR4 SDRAM, up to 64 GB total; supports DIMM, LRDIMM, NVDIMM
• Maximum Memory: Up to 64 GB (total across the board)
• Networking: Gigabit Ethernet onboard

How to install ASRock Rack EP2C621D12 WS Server Motherboard

Installing the EP2C621D12 WS in a compatible server chassis involves careful preparation and adherence to best practices for server assembly. Follow these general steps to ensure a reliable build and optimal performance:

• Power down the host system, unplug all power sources, and discharge any static.
• Prepare the chassis by installing the appropriate standoffs for the SSI EEB form factor and ensuring there is adequate airflow and cooling for dual-CPU operation.
• Install the CPUs into the Socket P LGA-3647 sockets. Apply a suitable amount of thermal interface material per vendor guidance and secure the coolers to maintain optimal temperatures under load.
• Install memory modules into the 12 DIMM slots, following the manufacturer’s memory population guidelines for dual-socket configurations to maximize interleaved bandwidth and stability.
• Mount the motherboard in the chassis, align screw holes, and secure with standoffs. Connect power supply cables, including CPU power rails, memory power, and any required chassis management connectors.
• Attach storage controllers and any expansion cards as required by your workload. Connect networking cables and ensure proper MAC addressing and management interfaces are visible in your BIOS/UEFI.
• Power on and enter the BIOS/UEFI. Update to the latest firmware if available, configure boot devices, memory XMP/UDIMM profiles, and CPU settings for desired performance and reliability settings. Save changes and exit, then install the operating system and required drivers.
• Run post-install health checks, including temperature, voltage, and fan speed monitoring, and verify that all CPUs and memory are recognized by the system. Validate virtualization or database workloads under typical load to confirm stability and performance.

Frequently asked questions

• What processors does this motherboard support? It supports dual Socket P LGA-3647 sockets for 2nd Gen Intel Xeon Scalable processors, enabling scalable performance for demanding workloads.
• How much memory can I install? The board offers 12 DIMM slots for DDR4 SDRAM with a maximum memory capacity of 64 GB across the entire board, using compatible DIMMs, LRDIMMs, or NVDIMMs.
• What is the form factor? The EP2C621D12 WS uses the SSI EEB form factor, measuring 12" x 13", optimized for dense server deployments and standard rack infrastructure.
• Does it include onboard networking? Yes, the board provides Gigabit Ethernet connectivity for reliable network performance and management access.
• Is this motherboard suitable for dual-processor servers? Yes. It is designed to run dual Intel Xeon Scalable processors, making it well-suited for virtualization hosts, databases, and other multi-processor workloads that require high throughput and memory bandwidth.