A P550 based board is the best you can get for now (~2-3x faster than the Banana Pi). In 2-3 months there should be a number of SpaceMIT k3 chips that are ~4-6x faster than the banana pi and somewhat reasonably priced (~200-300). By the end of the year, however, you should be able to get an ascalon chip which should be way way faster than that (roughly apple m1/zen3 speed)
I was really surprised by the s390x performance, but I also don't really understand why there are build time listed by architecture, not the actual processors.
What's fast on Z platforms is typically IO rather than raw CPU - the platform can push a lot of parallell data. This is typically the bottleneck when compiling.
The cores are in my experience moderately fast at most. Note that there are a lot of licencing options and I think some are speed-capped - but I don't think that applies to IFL - a standard CPU licence-restricted to only run linux.
M4 is 38 TOPS at INT8 precision whereas SpacemiT K3 is 60 TOPS at INT4 precision so at best they would be equal in "AI" performance but they are not because the rest of the K3 chip is much less capable than M4 (as I would expect).
E.g. M4 total system memory bandwidth is 120GB/s whereas K4 is 51GB/s, single core memory bandwidth is 100-120GB/s vs ~30GB/s. M4 has 10 CPU cores and neural engine with 16 cores whereas K3 has 8 CPU cores and 8 "AI" cores, K3 clock frequency is almost half the clock frequency in M4 etc. etc.
But anyway thanks for sharing, always good to learn about new hardware.
I remember taking down some notes wrt SiFive P870 specs, comparing them to x86_64, and reaching the same conclusion. Narrower core width (4-wide vs 8-wide), lower clock frequency (peaks at 3GHz) and no turbo (?), limited support for vector execution (128-bit vs 512-bit), limited L1 bandwidth (1x 128-bit load/cycle?), limited FP compute (2x 128-bit vs 2x 512-bit), load queue is also inconveniently small with 48 entries (affecting already limited load bandwidth), unclear system memory bandwidth and how it scales wrt the number of cores (L3 contention) although for the latter they seem to use what AMD is doing (exclusive L3 cache per chiplet).
I can't know what Ascalon will actually be, but back in April/May 2025 there were actual performance numbers presented by Tenstorrent, and I analyzed what was shown. I concluded that Ascalon would be the x86_64 equivalent of an i5-9600K.
That's useable for many applications, but it's not going to change the world. A lot of "micro PCs" with low power CPUs are well past that now. If that's what Ascalon turns out to be, it will amount to an SBC class device.
I don't know what bubble you are living in, but the i5-9600K is many steps up beyond "SBC class".
The Raspberry Pi 5 results on Geekbench 6 are all over the place. A score between 500 to 900 in single core and a 2000 multi core score.
Radxa 4 is an SBC based around the N100 and it basically gets the same or slightly higher performance as the Raspberry Pi 5.
Meanwhile the i5-9600K gets a score of 1677 in single core, which is 83% of the performance of the entire Raspberry Pi 5 and gets a score of 6199 when using multiple cores, that's 3x the performance.
I'd call this at least "Laptop class" and you even admitted yourself back in 2025 that you're using a processor on that level.
My bubble includes a number of SBCs and embedded boards from Advantech, frequently using Ryzen embedded (V1000 class) CPUs.
SBC is too vague I suppose. Past the Raspberry Pi form factor SBC class, there are many* SBC vendors with Core i5-1340P and similar CPUs today. That's a 2023 device, and just past a 2018 i5-9600K, aligning well with what I claimed.
In 2025+, such a CPU is not a desktop class device, and is sufficient only in low cost laptops (but in much lower power form.) A MacBook Neo A18, for example, is considerably better than a i5-9600K.
It would be great if Tentorrent actually yields such a product, and if, based on later performance projections that appeared in late 2025, Ascalon is actually faster, but, as I said, the world will not change much. RISC-V developers will appreciate compiling like it's 2019, but that's as far as it will go.
* LattePanda Sigma, ASROCK NUC, DFROBOT, Premio and many NAS and industrial devices.
TBH I still don't really get how it's different from MIPS. As far as I can tell... Loongson seems to be really just MIPS, while LoongArch is MIPS with some extra instructions.
Wait, this is a modern-ish ISA with a software-managed TLB, I didn’t realize that! The manual seems a bit unhappy about that part though:
> In the current version of this architecture specification, TLB refill and consistent maintenance between TLB and page tables are still [sic] all led by software.
(purely on vibes) loongson feels to me like an intermediate step/backup strategy rather than a longterm target (though they'll probably power govt equipment for decades of legacy either way :p)
