Near Storage Accelerator with Kintex FPGA

Directly Attached Accelerator & Proxy In-Line Accelerator

Obsolete Product Notice:

This is an obsolete product and is no longer available for purchase. Contact BittWare for a recommended newer product.


The 250S+ is a fully-programmable NIC-sized near-storage accelerator featuring a Xilinx UltraScale+ Kintex FPGA. This PCIe Gen 3-capable accelerator card can be added to PCIe or CAPI-enabled server platforms introducing an energy-efficient acceleration capability for applications including:

  • Database Acceleration
  • In-line Compression/Encryption
  • Checkpoint Restarting
  • Burst Buffer Caching

The 250S+ is available with a choice of two configurations: up to four M.2 NMVe SSDs coupled on-card to the Xilinx FPGA, OCuLink or MiniSAS-HD break-out cabling allowing the 250S+ to be part of a massively scaled storage array.

Key Features

Up to 4x NVMe drives

Up to 8 GBytes DDR4

KU15 Kintex UltraScale+ FPGA: 1.1 million LCs

Block Diagram, Data Sheet and Specifications

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Request the Hardware Reference Guide (HRG)

The HRG gives you much more detail about the card such as block diagrams, tables and descriptions.



  • Xilinx Kintex UltraScale+
    • KU15P in a FFVA1156 package
    • Core speed grade -2
  • Contact BittWare for other FPGA options

On-board DDR4 SDRAM

  • One bank of DDR4 SDRAM x80 bits
  • 8GB per bank (4GB version also available)
  • Transfer Rate: 2400 MT/s

Host interface

  • x8 mechanical PCIe Gen3

Storage options

  • Four on-board 960GB NVMe SSD sticks
  • Four OCuLink cables
  • Four MiniSAS-HD cables

Power supply monitoring & reporting

  • Voltage monitoring
  • Temperature monitoring
  • Fault condition reporting to FPGA


  • Single-width passive heatsink for FPGA power up to 25W
  • Double-width passive heatsink for FPGA power up to 50W


  • On-card power derived from PCIe slot supplies
  • Power dissipation is application dependent
  • Typical FPGA power consumption ~25-50W


  • Operating temperature: 5°C to 35°C


  • Manufactured to IPC JSTD-001 Class 3
  • RoHS compliant

Form factor

  • Half-height, half-length PCIe board
  • Dimensions: 167.7 mm x 68.9 mm
  • Single or double-width option
  • Full-height PCI bracket option

Development Tools

FPGA development

  • BIST - Built-In Self-Test for CentOS 7 provided with source code (pinout, gateware, PCIe driver and host test application)

Application development

  • Xilinx Tools - Vivado Design Suite HLx Editions: HDL and C/C++ with HLS
  • OpenPOWER CAPI SNAP 2.0 for POWER9


  • 250S+ FPGA board
  • Built-In Self-Test (BIST)
  • 1-year access to online Developer Site
  • 1-year hardware warranty

Order Your Cards in a TeraBox™ FPGA Server

Get extended warranty support and save time with a pre-integrated solution!

TeraBox 1000S server photo
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TeraBox 2000D server photo
TeraBox 4000S server photo

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