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SiFive Intelligence
X300 Series

SiFive Intelligence
X390

Building on the highly popular SiFive Intelligence™ X280 products’ success in AI/ML applications across mobile, infrastructure and automotive applications, where they are frequently coupled to hardware accelerators. The X390 brings a 4x improvement to vector computation with its single core configuration, with doubled vector length and dual vector ALUs.

There is also 4x the sustained data bandwidth increase due to architecture improvements and data width increases. With SiFive VCIX, companies can easily add their own vector instructions and/or acceleration hardware, bringing unprecedented flexibility and allowing them to greatly increase performance with custom instructions.

SiFive Intelligence
X390 Key Features

  • RISC-V Vector extension supported
  • Up to 1024-bit VLEN Dual Vector ALU
  • 512-bit DLEN
  • SiFive Intelligence Extensions for ML workloads
    - Custom instructions to greatly accelerate Neural Network computation
    - Optimized neural network libraries and Open XLA support
  • 1024-bit vector register length processor
    - Variable length operations, up to 512-bits of data per cycle
    - Ideal balance of control logic and data parallel compute
    - Decoupled Vector pipeline
    - INT8 to INT64 integer data type
    - BF16/FP16/FP32/FP64 floating point data type
  • Built on silicon-proven U7-Series core
    - 64-bit RISC-V ISA
    - 8-stage dual-issue in-order pipeline
    - Coherent multi-core, Linux capable
  • High performance vector memory subsystem
    - Shared L2 Cache architecture optimized for vector compute
    - Dedicated uncached data movement port
  • Multi-core processor configuration, up to 4 cores
  • VCIX interface for direct connectivity of external hardware accelerator (2048 bit write, 1024 bit read)

SiFive Intelligence Family

X200 Series
Intelligence
  • 512-bit Vector length
  • Single Vector ALU
  • VCIX (1024-bit)
XM Series
Intelligence
  • Scalable Matrix Engine
  • 4 X300 cores per cluster
  • 1 Cluster = 16 TOPS (INT8)

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Core IP Families

Automotive
SiFive Automotive™ solutions provide a range of high-end application and real-time processors, delivering industry-leading performance, minimal area, and low power consumption. ISO 21434, SO26262 ASIL B, ASIL D and split-lock certifications.
Intelligence
Intelligence embraces a software-first approach to processor design, addressing the future needs of deploying ML and AI at the edge. It provides high-performance, scalable vector and matrix compute capabilities, adaptable to evolving workloads.
Performance
The SiFive Performance™ family of RISC-V processors is designed for maximum throughput and performance efficiency for a range of application from datacenter workloads, ranging from Web servers and multimedia processing, Networking/Storage to consumer applications like TV, wearables and other smart devices requiring AI functionality.