3 ms·

Any performance comparisons with Raspberry Pi boards? How does this RISC-V CPU stack up against them?

by bhouston 4y ago

rjsw 4y ago
A board that you can buy will perform better than one that is unavailable.
- chris_overseas 4y ago
  For what it's worth, I managed to get an RPi4 at retail price within a few days by setting the appropriate filters on https://rpilocator.com https://rpilocator.com and keeping a watch on it with an Android app called "Web Alert". I've used the same trick to buy out-of-stock cameras and laptops too, works a treat.
pmw 4y ago
Not great; VisionFive appears to be significantly less performant. https://browser.geekbench.com/v5/cpu/compare/17159543?baseline=15878552 https://browser.geekbench.com/v5/cpu/compare/17159543?baseli...
- viraptor 4y ago
  We're still in the early days of risc-v availability. Arm has been widely deployed and the compilers optimised by both individuals and companies. I expect this comparison to look better in a year (not better than rpi4, just a smaller gap)
- CUViper 4y ago
  There are a few where it does win though -- I wonder what characteristics favor VisionFive in those?
- andrekandre 4y ago
  afaict rbpi cpu has vector instructions? if so, i wonder how much that contributes to the difference...?
  - adgjlsfhk1 4y ago
    a lot.
    - snvzz 4y ago
      Fortunately, at least for video codecs, there's a hardware acceleration block, and it is significantly stronger than the one rpi4's SoC has. Unfortunately, there's no drivers in the current images, and it'll take time to have proper open drivers and integration with common APIs such as vdpau.
- snvzz 4y ago
  U74-MC performance is not an unknown, and they can do much better than that. Of course, there's a lot of software factors holding it back, such as quality or lack of drivers. Benchmarks will be worth re-running in a few months, once some level of ecosystem is in place.
_joel 4y ago
Faster than a 3 but slower than a 4 by raw clock speed but ymmv with real world usage
bullen 4y ago
CPU slower than 4 as said, but even Jetson Nano is slower that the mad performance per watt of the 4. BUT the GPU is apparently better which would make this THE SBC. I will test my 3D MMO engine and give exactly what is what once I receive mine, should be a couple of days. The Raspberry GPU has a serious cache problem, it can't render a triangle at 60FPS in 1080p!!! But 100 non-instanced animated characters (each with a unique weapon in hand) at 60FPS and low res (800x600). Jetson (1/2 Nintendo Switch GPU) does 300 at 60 FPS in 1080p. If the Visionfive 2 is either: - 100+ at 60 FPS and 1080p - 200+ at 60 FPS and 800x600 I'm going ALL IN on Risc-V (my own VM for scripting the engine) and StarFive (buy a few to use as demo for the MMO instead of Raspberry 4/Jetson Nano).
- snvzz 4y ago
  >the mad performance per watt of the 4. More like bad than mad. This SoC is far more efficient, using just 4.4w on full load and achieving some 80% of rpi4's cpu performance at a much lower power, with no need for a heatsink.
  - bullen 4y ago
    We'll see, if you need a heatsink for this here is one I bought which should fit: http://www.enzotech.com/cnb_s1l.htm http://www.enzotech.com/cnb_s1l.htm Not going to debate the gflops/w yet, but Raspberry 4 cores are also around 1W each and they kick ass compared to even M1 (much worse OFC, but per $/openess they still win imo)
    - snvzz 4y ago
      If the SoC in rpi4 was any good, it wouldn't need a huge heatsink to not throttle. The reality is that it draws around 10w more often than not.
      - bullen 4y ago
        I know what 10W feels like because the Jetson Nano draws that, and Raspberry 4 is 7W with GPU+4 cores saturated. You will need a heatsink on the Visionfive if the GPU does what I hope it does. The Raspberry 4 GPU is only 1W vs. 5W on the Jetson Nano! I'm hoping for a 2-3W GPU on the Visionfive and then you'll need a heatsink for MMO gameplay no question about it. Longevity is now crucial as hardware peaks, heat kills electronics slowly but oh so surely! Edit: Do you have a URL for those 3.xW and 4.4W claims... Then I think we wont see 100+ but cache can still be larger so you can have 100 at 1080p and that is enough for mainsteam adoption and replacing all other computers (Switch, PS4, XBOX, phones and pads etc.)! The future belong to those that compile!

Any performance comparisons with Raspberry Pi boards? How does this RISC-V CPU stack up against them?

rjsw 4y ago

A board that you can buy will perform better than one that is unavailable.

chris_overseas 4y ago
For what it's worth, I managed to get an RPi4 at retail price within a few days by setting the appropriate filters on https://rpilocator.com https://rpilocator.com and keeping a watch on it with an Android app called "Web Alert". I've used the same trick to buy out-of-stock cameras and laptops too, works a treat.

pmw 4y ago

Not great; VisionFive appears to be significantly less performant. https://browser.geekbench.com/v5/cpu/compare/17159543?baseline=15878552 https://browser.geekbench.com/v5/cpu/compare/17159543?baseli...

viraptor 4y ago
We're still in the early days of risc-v availability. Arm has been widely deployed and the compilers optimised by both individuals and companies. I expect this comparison to look better in a year (not better than rpi4, just a smaller gap)
CUViper 4y ago
There are a few where it does win though -- I wonder what characteristics favor VisionFive in those?
andrekandre 4y ago
afaict rbpi cpu has vector instructions? if so, i wonder how much that contributes to the difference...?
- adgjlsfhk1 4y ago
  a lot.
  - snvzz 4y ago
    Fortunately, at least for video codecs, there's a hardware acceleration block, and it is significantly stronger than the one rpi4's SoC has. Unfortunately, there's no drivers in the current images, and it'll take time to have proper open drivers and integration with common APIs such as vdpau.
snvzz 4y ago
U74-MC performance is not an unknown, and they can do much better than that. Of course, there's a lot of software factors holding it back, such as quality or lack of drivers. Benchmarks will be worth re-running in a few months, once some level of ecosystem is in place.

_joel 4y ago

Faster than a 3 but slower than a 4 by raw clock speed but ymmv with real world usage

bullen 4y ago

CPU slower than 4 as said, but even Jetson Nano is slower that the mad performance per watt of the 4. BUT the GPU is apparently better which would make this THE SBC. I will test my 3D MMO engine and give exactly what is what once I receive mine, should be a couple of days. The Raspberry GPU has a serious cache problem, it can't render a triangle at 60FPS in 1080p!!! But 100 non-instanced animated characters (each with a unique weapon in hand) at 60FPS and low res (800x600). Jetson (1/2 Nintendo Switch GPU) does 300 at 60 FPS in 1080p. If the Visionfive 2 is either: - 100+ at 60 FPS and 1080p - 200+ at 60 FPS and 800x600 I'm going ALL IN on Risc-V (my own VM for scripting the engine) and StarFive (buy a few to use as demo for the MMO instead of Raspberry 4/Jetson Nano).

snvzz 4y ago
>the mad performance per watt of the 4. More like bad than mad. This SoC is far more efficient, using just 4.4w on full load and achieving some 80% of rpi4's cpu performance at a much lower power, with no need for a heatsink.
- bullen 4y ago
  We'll see, if you need a heatsink for this here is one I bought which should fit: http://www.enzotech.com/cnb_s1l.htm http://www.enzotech.com/cnb_s1l.htm Not going to debate the gflops/w yet, but Raspberry 4 cores are also around 1W each and they kick ass compared to even M1 (much worse OFC, but per $/openess they still win imo)
  - snvzz 4y ago
    If the SoC in rpi4 was any good, it wouldn't need a huge heatsink to not throttle. The reality is that it draws around 10w more often than not.
    - bullen 4y ago
      I know what 10W feels like because the Jetson Nano draws that, and Raspberry 4 is 7W with GPU+4 cores saturated. You will need a heatsink on the Visionfive if the GPU does what I hope it does. The Raspberry 4 GPU is only 1W vs. 5W on the Jetson Nano! I'm hoping for a 2-3W GPU on the Visionfive and then you'll need a heatsink for MMO gameplay no question about it. Longevity is now crucial as hardware peaks, heat kills electronics slowly but oh so surely! Edit: Do you have a URL for those 3.xW and 4.4W claims... Then I think we wont see 100+ but cache can still be larger so you can have 100 at 1080p and that is enough for mainsteam adoption and replacing all other computers (Switch, PS4, XBOX, phones and pads etc.)! The future belong to those that compile!