4 ms·

Yet you haven’t provided any proof of this. Best I could find is that boards based on either A55 or U74 have a power draw to wall of ~5W under load, with negli

• snvzz 3y ago
  >Yet you haven’t provided any proof of this. I learned about it from press releases back when it launched. Here's the first one I found with 15 seconds of Google effort[0]. Relevant page is 5. SiFive has since revised U74's design multiple times providing even higher performance on the same envelope[1]. >Best I could find is that boards based on either A55 or U74 have a power draw to wall of ~5W under load, with negligible differences in performance. SBCs typically have hardware besides the SoC, and the CPUs themselves constitute a small part of the draw of the SoCs used, which in the first place could be fabbed on different nodes. They do not make for very useful comparisons, e.g. my pi4 and VisionFive2 have virtually the same power draw, but the VF2 has a M.2 SSD mounted, whereas the RPi4 does not support USB-PD, so there should be further losses in voltage conversion. Too many variables hide CPU power efficiency. 0. https://c.a.segger.com/fileadmin/documents/Press_Articles/2021/211110_EN_Press_elektroniknet_SEGGER_RISC_V_Processors_new.pdf https://c.a.segger.com/fileadmin/documents/Press_Articles/20... 1. https://linuxgizmos.com/sifive-speeds-up-risc-v-u74-cores-as-canaan-unveils-a-3-tops-kendryte-k510/ https://linuxgizmos.com/sifive-speeds-up-risc-v-u74-cores-as...
  • manuelabeledo 3y ago
    So the link contents are essentially marketing material coming from SiFive? Alright then.