Tyan Tomcat SX S8026 (S8026GM2NRE) - Overview

(Item pictured represents S8026GM2NRE only.)

TYAN Tomcat SX S8026

Single Socket AMD EPYC Server Motherboard

  • Up to 32 CPU Cores / 64 Threads
  • 16 DIMM slots supporting up to 2TB DDR4 RAM
  • (8) 80-Pin Oculink connectors with 16 NVMe ports
  • (2) NVMe 2280 / 22110 M.2 ports
  • (2) PCIe x24 riser card slots
  • OCP v2.0 x16 LAN Mezzanine
  • AST2500 BMC with Redfish support

Tyan Tomcat SX S8026 (S8026GM2NRE)

Tyan Tomcat SX S8026 (S8026GM2NRE)
SKU Oculink Ports Form Factor UPC code
S8026GM2NRE (8) 80-Pin Oculink (64 PCIe Lanes / 16 SATA ports) EATX 635872043710
S8026GM2NR-LE (2) 80-Pin Oculink (16 PCIe Lanes / 16 SATA ports) EATX 635872044786

Tyan s8026 Single Socket AMD EPYC Server Motherboard

Tyan's Tomcat SX S8026 is an NVMe focused single socket AMD EPYC (Formerly codenamed "Naples") motherboard in an EATX form factor. Harnessing the power of a single AMD SP3 socket, the board is designed to deliver 2P performance within a 1P footprint. The motherboard is designed for traditional 2P workloads such as fast cloud storage, real time analytics, big data, e-commerce, and video streaming applications. It features support for high speed NVMe deployment with 64 PCIe lanes available near the front of the motherboard over eight PCIe x8 SFF-8611 Oculink connectors. By adopting an industry standard EATX form factor, the s8026 allows customers to deploy it with minimal integration efforts into existing chassis designs.

Key Features


The AMD EPYC processor offers the highest possible performance from a single CPU socket, including:
  • Up to 32 CPU cores and 64 threads
  • Support for up to 2TB total RAM per socket on all CPU models
  • 128 PCIe lanes

Dual Socket Feature Set

Traditionally, the only way to deploy a large number of PCIe devices has been to select a dual-socket motherboard even if the compute demands of the server was low. Tyan has targeted these applications with the AMD EPYC platform by supporting up to 124 PCIe lanes and 8 memory channels in a single-socket platform. Significant savings can be had both in CPU cost and power consumption by migrating workloads to a single socket AMD EPYC platform.

124 PCIe Lanes

The s8026 motherboard was designed from the ground up to take full advantage of AMD's Single-Socket I/O capabilities. The board exposes 124 PCIe lanes across a variety of connectors:
  • (8) PCIe x8 SFF-8611 Oculink connectors for NVMe
  • PCIe Gen 3.0 x24 Riser Card Slot
  • PCIe Gen 3.0 x16 Riser Card Slot
  • PCIe Gen 3.0 x16 OCP LAN Mezzanine
  • PCIe Gen 3.0 x2 NVMe M.2 ports for OS drives

16 NVMe Ports

NVMe technology offers breakthrough performance for SSDs by attaching storage devices directly to the PCIe bus, freeing them from the SATA protocol that was originally designed for slower rotational media. This technology significantly reduces storage latency and increases transfer speeds.

To put things into perspective, during the summer of 2017 the fastest SATA SSDs on the market were already saturating the SATA 6G bus with peak sequential transfer rates of 550MB/s read and 520 MB/s write. The bigger pipe and lower latency of the NVMe PCIe x4 link allows the fastest NVMe SSDs to reach sequential read rates of 3,500MB/s and read rates around 2,100MB/s. Non-sequential performance heavily favors NVMe devices as well, with typical SATA SSDs achieving 4K random read/write performance around the 100K IOPS mark. In comparison, performance NVMe devices routinely offer 4K random R/W numbers in the neighborhood of 350-450K+ IOPS.

Previous motherboard designs were not well suited to NVMe deployment due to a lack of PCIe lanes. Each NVMe device requires a PCIe x4 link. Large numbers of these devices could not previously be deployed without expensive and bottleneck inducing switch chips or without quickly running out of I/O resources for other devices in the server. The AMD EPYC CPU is ideal for this storage technology, featuring support for 128 PCIe lanes from a single CPU socket.

The Tomcat SX S8026 is designed to offer the most robust support for NVMe storage of any server motherboard ever made. The AMD EPYC architecture allows Tyan to supply 64 PCIe lanes for a total of 16 NVMe ports across eight 80-Pin Oculink cables. The motherboard also features a pair of PCIe x24 riser card slots, and the total number of NVMe ports can be increased to 20 or 24 devices by installing one or two M2093 NVMe risers.

High Expandability

Tyan's Tomcat SX S8026 motherboard offers maximum expandability within a standard 12” x 13” SSI EEB form factor. This offers outstanding expansion capabilities in standard 1U server enclosures. A commodity 1U server chassis can support three PCIe x16 slots:
  • (1) PCIe x16 OCP LAN Mezzanine (Supporting network speeds up to 100Gb/s)
  • (2) PCIe x16 FH/HL cards (In Left and Right 1U riser cards)

M7106-L16-1F (Sold separately)

M7106-R16-1F (Sold separately)

Things get more interesting in a 2U chassis as the motherboard features a pair of PCIe x24 slots. Tyan has a pair of available 2U riser cards with a MUX that support either x16/x0/x8 or x8/x8/x8 support, allowing each card to support up to one x16 slot and a x8 slot, or up to three x8 depending on configuration.

Outstanding SATA Performance

Each of the SATA ports on the AMD EPYC platform are derived from a PCIe x1 link. Unlike competing architectures which impose a performance bottleneck on the SATA controller, every SATA port on the AMD EPYC die get full SATA 6G throughput. This means that every single SATA port is fully capable of 550MB/s+ simultaneously. Early performance testing has shown total aggregate SATA performance in excess of 8GB/s across the board's 18 SATA ports.

Up to 18 SATA Ports

Some of the EPYC I/O ports can be remapped to support either PCIe or SATA ports. The s8026's BIOS supports I/O remapping on a pair of Oculink connectors, allowing the platform to support up to 18 SATA ports without an additional HBA.

180W CPU Support

AMD's top bin EPYC CPU supports up to 32 CPU cores and draws upwards of 180W. The s8026 VRM design can support the full range of AMD EPYC CPUs all the way up to their top bin 180W parts.

IPMI 2.0 with Redfish Support

Featuring AMI MegaRAC firmware, the s8026 motherboard offers support for IPMI 2.0 with iKVM and the DMTF Redfish management protocol.