ASRock Rack EP2C621D16-4LP Server Motherboard – Intel C621 Chipset, Socket P LGA-3647

Master the performance demands of modern data centers and enterprise workloads with the ASRock Rack EP2C621D16-4LP Server Motherboard. Built around the Intel C621 chipset and Socket P LGA-3647, this SSI EEB form factor board is designed to deliver reliable, scalable computing for 2nd Gen Intel Xeon Scalable processors. It combines robust memory capacity, enterprise-grade connectivity, and motherboard-level features that cater to rack, blade, and high-density deployments. Whether you are building a dense compute node, a storage server, or a virtualization host, this motherboard provides the foundation for stable operation, consistent I/O throughput, and long-term upgradeability. With ASRock Rack engineering, you gain a platform purpose-built for reliability, easier maintenance, and a clear upgrade path as workloads evolve.

• Processor compatibility and chipset: The EP2C621D16-4LP leverages the Intel C621 chipset and a Socket P LGA-3647 to support 2nd Gen Intel Xeon Scalable processors. This combination delivers high core counts, ample cache, and advanced virtualization capabilities, making it ideal for virtualization hosts, database services, and high-performance computing tasks. The board is engineered with enterprise-grade power delivery and thermal management to sustain peak efficiency under prolonged workloads, ensuring consistent performance in data center environments.
• Memory capacity and options: It provides 16 DDR4 DIMM slots, enabling flexible RAM configurations up to 64 GB of SDRAM. The board supports RDIMM and LRDIMM modules to optimize memory bandwidth and stability for memory-intensive applications and large-scale databases. This memory configuration is well-suited for in-memory analytics, virtualization environments, and enterprise apps that demand reliable, low-latency access to data.
• Form factor and design for SSI EEB: With a 12" x 13" SSI EEB footprint, the EP2C621D16-4LP is designed to fit into standard enterprise enclosures and backplanes, ensuring broad compatibility with a wide range of server racks. The layout emphasizes heat dissipation, straightforward component accessibility, and clean cable management, helping IT teams simplify maintenance, BIOS updates, and future upgrades in busy data centers.
• Networking and I/O essentials: The motherboard includes onboard Gigabit Ethernet for immediate network connectivity, management, and data transfer. This onboard network interface provides a reliable starting point for server deployments, remote management, and monitoring, while maintaining compatibility with typical enterprise backplanes and networking gear. The design prioritizes stability and compatibility with common management tools used in server environments.
• Reliability and upgrade path: Built for scale, the EP2C621D16-4LP emphasizes durability through a robust power design and thermal management that cope with sustained workloads. It offers a clear upgrade trajectory for CPU, memory, and backplane options, enabling organizations to extend the useful life of their server hardware as workloads grow or shift—an important consideration for cost-effective data center planning and hardware refresh cycles.

Technical Details of ASRock Rack EP2C621D16-4LP Server Motherboard

• Chipset: Intel C621
• CPU Socket: Socket P LGA-3647
• Processor support: 2nd Gen Intel Xeon Scalable Processors
• Memory slots: 16 x DDR4 DIMM slots
• Memory maximum: 64 GB SDRAM
• Memory type: RDIMM and LRDIMM supported
• Form factor: SSI EEB (12" x 13")
• Onboard networking: Gigabit Ethernet

How to install ASRock Rack EP2C621D16-4LP

• Prepare a compatible server chassis that supports SSI EEB boards and provides adequate cooling for 2nd Gen Xeon CPUs. Verify clearance for the LGA-3647 socket and ensure power and airflow requirements meet the chassis specifications.
• Power down all equipment and discharge static electricity before handling the motherboard. Place the board on an anti-static mat and align it with the chassis mounting standoffs.
• Install the appropriate Xeon processor into the Socket P LGA-3647 socket. Follow the socket orientation marks, secure the CPU, and apply thermal interface material or install the included heatsink kit according to the manufacturer’s instructions for optimal cooling performance.
• Insert memory modules into the 16 DDR4 DIMM slots, following the motherboard’s population guidelines to maximize memory bandwidth and stability. Use RDIMM or LRDIMM modules as supported, and verify they are seated firmly in place.
• Mount the motherboard into the chassis, secure with screws to the standoffs, and connect all required power cables, data cables, and management interfaces as per the motherboard manual. After installation, perform a post-in test to ensure all components power on correctly and the BIOS recognizes CPU and memory.
• Power on the system and enter the BIOS/UEFI to configure processor features, memory settings, boot order, and any chassis management options. Update to the latest BIOS revision if available to maximize compatibility with 2nd Gen Xeon CPUs and future firmware improvements.

Frequently asked questions

Q: What processors does this motherboard support?

A: The ASRock Rack EP2C621D16-4LP supports 2nd Gen Intel Xeon Scalable processors, in combination with the Intel C621 chipset and Socket P LGA-3647. This pairing provides strong performance for virtualization, databases, and high-demand workloads.

Q: How much memory can I install, and what modules are supported?

A: The board offers 16 DDR4 DIMM slots with a maximum of 64 GB SDRAM. It supports RDIMM and LRDIMM memory modules, allowing for scalable memory configurations suitable for enterprise applications and data-intensive tasks.

Q: What is the form factor of the board?

A: The EP2C621D16-4LP uses the SSI EEB form factor, measuring 12 inches by 13 inches, which aligns with standard enterprise backplanes and server enclosures for reliable deployment in data centers and rack environments.

Q: Does it include onboard networking?

A: Yes, the motherboard includes onboard Gigabit Ethernet to provide immediate network connectivity for management, monitoring, and data transfer right out of the box.