RISC-V CPU Performance Up 8x In Five Years: SiFive HiFive Unmatched To SpacemiT K3

Written by Michael Larabel in Processors on 9 June 2026 at 10:12 AM EDT. Page 3 of 6. 28 Comments.

👁 C-Ray benchmark with settings of Performance Per Thread, Resolution: 1080p, Rays Per Pixel: 16. SpacemiT K3 Pico ITX was the fastest.

👁 C-Ray benchmark with settings of Performance Per Thread, Resolution: 4K, Rays Per Pixel: 16. SpacemiT K3 Pico ITX was the fastest.

Even when taking into account the increased number of cores with the K3, there were very nice per-core gains compared to the days of the SiFive FU740.

👁 CacheBench benchmark with settings of Performance Per Thread, Test: Read. SpacemiT K3 Pico ITX was the fastest.

👁 CacheBench benchmark with settings of Performance Per Thread, Test: Write. SpacemiT K3 Pico ITX was the fastest.

👁 CacheBench benchmark with settings of Performance Per Thread, Test: Read / Modify / Write. SpacemiT K3 Pico ITX was the fastest.

The CPU cache performance was much greater with the K3 compared to the SiFive HiFive developer board.

👁 7-Zip Compression benchmark with settings of Performance Per Thread, Test: Compression Rating. SpacemiT K3 Pico ITX was the fastest.

👁 7-Zip Compression benchmark with settings of Performance Per Thread, Test: Decompression Rating. SpacemiT K3 Pico ITX was the fastest.

The 7-Zip benchmarks show the great overall performance gains and per-core/thread improvements of RISC-V over the past five years.

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URL: https://www.phoronix.com/review/risc-v-5-year-performance/3

⇱ RISC-V CPU Performance Up 8x In Five Years: SiFive HiFive Unmatched To SpacemiT K3 - Phoronix

RISC-V CPU Performance Up 8x In Five Years: SiFive HiFive Unmatched To SpacemiT K3