HiFive Unmatched

A high-performance RISC-V Linux development platform, in a desktop-ready Mini ITX mainboard

$313,691 raised

of $1 goal

Not Available
Dec 15 2020
funded on

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The HiFive Unmatched from SiFive ushers in a new era of RISC-V Linux development platform in a PC form factor. Powered by the SiFive Freedom U740 RISC-V SoC and targeted for creating RISC-V applications, the platform features 16 GB of 64-bit DDR4 memory operating at 2400 MT/s, high-speed interconnects with PCIe Gen 3 x8 operating at 7.8 GB/s, Gigabit Ethernet, and USB 3.2 Gen 1. Software development is supported with Freedom U-SDK from SiFive, which provides a fast and convenient software environment to quickly build and modify a custom Linux distribution for this RISC-V PC.

The Freedom U740 SoC is the highest performance RISC-V processor available today, and the Unmatched board is ready to be your next desktop.

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In February 2018, SiFive launched the HiFive Unleashed board, a demonstration and evaluation board for the highest-performance RISC-V processor available at the time, the Freedom U540. While it did not include common PC interfaces like PCIe or USB, it offered expansion opportunities via a ChipLink high-speed serial interface. A few months later, the Microsemi HiFive Unleashed Expansion Board launched to supplement the Unleashed with PCIe, USB, HDMI, and a host of additional peripherals for experimentation and development. This combination brought a usable desktop RISC-V PC to users for the first time.

The Unmatched board is a significant performance iteration and cost reduction from this combination, and SiFive is proud to be able to be able to bring an exceptional RISC-V platform to an even wider audience of users and developers.

Features & Specifications

Block Diagrams

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1. DDR4 SDRAM9.Expansion header17. M.2 Key E connector
2. PMIC10. Current monitor18. M.2 Key M connector
3. QSPI flash11. JTAG header19. x16 PCIe connector
4. PCIe switch12. microSD card slot20. Front panel header
5. USB hub13. microUSB-UART console21. 24-pin ATX power connector
6. PCIe-USB bridge14. RJ45 connector22. FU740 reset
7. Ethernet PHY15. x2 USB connector23. Global reset
8. UART-USB controller16. x2 USB connector24. On/off switch

Support & Documentation

A full suite of documentation will be available on the SiFive website, including:

Additionally, the board will ship with a microSD card preloaded with the SiFive Freedom U-SDK, including these components:

What’s in the Box?

A typical desktop PC build will need to add:

We are in the process of validating commodity SSD, GPU, and wireless card options. We will post fully validated recommendations in the coming weeks.

SiFive HiFive Unmatched

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Produced by SiFive in San Mateo, CA.

Sold and shipped by Crowd Supply.

HiFive Unmatched

HiFive Unmatched Mini-ITX Board, with onboard DDR4 RAM and SiFive Freedom U740 processor.

$665 Free US Shipping / $18 Worldwide

About the Team


San Mateo, CA  ·  sifive.com

SiFive is the leading provider of processor cores, accelerators, and SoC IP to create domain-specific architecture based on the free and open RISC-V instruction set architecture. SiFive offers scalable, configurable processor cores pre-integrated with security, trace, and debug features for workload-specific accelerator designs. Founded by the inventors of RISC-V, SiFive has 15 design centers worldwide and backing from Sutter Hill Ventures, SK Hynix, Qualcomm Ventures, Western Digital, Intel Capital, Spark Capital, Osage University Partners, and Prosperity7 Ventures.

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