alt Hacker NewsRISC-V is quite wimpy this far, so it’s not even clear if it can saturate a gigabit with features turned on. The one benefit is that it doesn’t have Intel IME/AMT, AMD PSP or ARM TrustZone backdoors built-in, but I would be extremely surprised if the Chinese SpaceMiT CPU didn’t have Chinese backdoors of its own.
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throwaway27448 • yesterday at 10:12 PM
> The one benefit is that it doesn’t have Intel IME/AMT, AMD PSP or ARM TrustZone backdoors built-in, but I would be extremely surprised if the Chinese SpaceMiT CPU didn’t have Chinese backdoors of its own.
That seems worth paying for. How could china hurt me more than my own government?
Melatonic • yesterday at 9:37 PM
Exactly - seems like the only big thing going for it
> it’s not even clear if it can saturate a gigabit
If that's the case then it's not the CPU's fault. I can't open the linked site but assuming it's really the same as a BPI-F3 i.e. a SpacemiT K1 chip, that can do 2.8 GB/sec on large RAM to RAM memcpy using a CPU core i.e. 44 Gbps total, 22 Gbps each read and write. Plus I assume it's got DMA so no need to involve the CPU anyway.
Here is a test I ran in April 2025 on a Sipeed LicheePi 3A same chip).
https://hoult.org/K1_memcpy.txt
> RISC-V is quite wimpy this far
The new K3 chip from the same manufacturer does 8.7 GB/s RAM to RAM memcpy using a dual issue in-order A100 ("AI") core, just over 3x faster.
Sure this pales in comparison to recent Apple / Intel / AMD but it's a lot faster than home networking.