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Zhaoxin's KX-7000

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Re: Zhaoxin's KX-7000

#31
I wonder if Zhaoxin's VIA heritage is helping them or holding them back - because of the patents, they were the only ones allowed to try, but since x86_64 and SSE2 are both now more than 20 years old, most of the patents don't matter any more (and AVX is not far from the cutoff).

The breakaway ARM China or SpacemiT or Loongson could drop in an x86_64 frontend and might get better results.

Re: Zhaoxin's KX-7000

#32

This review is an object lesson about why there is so much more to shipping a decent processor than making a CPU core with reasonable performance (and decent is being polite given that we are talking about Bulldozer-class single-threaded perf, which most folks were beyond thrilled to abandon when Zen arrived eight years ago.) The behavior of the memory controller is wild to see in this day and age. You really don't w…

Memory controllers are the biggest bottleneck (ha) to performant systems these days. The cores themselves are fine, but the memory controllers are slow and buggy.

Re: Zhaoxin's KX-7000

#33
post #19

Note there are competent RISC-V architectures in China which might already be faster at emulating x86 than the KX-7000 is at running it directly.

Not just RISC-V, when it comes to performance the Loongson CPUs (with the LoongArch ISA) are likely the most competitive -- the IPC of Loongson 3A6000 is around that of 10th ~ 12th gen Intel CPUs! And 3A7000 is coming soon.

Zhaoxin is China's answer to "what if we need a drop-in x86 replacement immediately?" It does not represent the frontier of CPU development in the country.

Re: Zhaoxin's KX-7000

#34

This review is an object lesson about why there is so much more to shipping a decent processor than making a CPU core with reasonable performance (and decent is being polite given that we are talking about Bulldozer-class single-threaded perf, which most folks were beyond thrilled to abandon when Zen arrived eight years ago.) The behavior of the memory controller is wild to see in this day and age. You really don't w…

This appears to be a new x86 design, but why? I thought there was good riscv-64 stuff out there now.

Re: Zhaoxin's KX-7000

#35

This is interesting! Does anyone know how China’s reliance on chips from intel and amd is in the non-AI space (so regular consumer and server loads)? I’m wondering how it was 10 and 5 years ago, now, and how we predict in the next couple of years. Surely if they’re not mostly using their own chips they will very soon right?

They push local chips for independence, but unless the west embargoes them, I don't think you will see a major leap forward.

Huawei is a whole different beast though. They have a everything from the chip design up, and by now also an operating system that has arguably both a better frontend framework and a better kernel that the Linux alternatives. When we talk about Chinese AI chips being slow we specifically talk about classic desktop chips.

Also! For normal desktop work a 2011 intel chip is plenty fast. A lot of critical systems like train booking systems are keyboard focused ancient UI systems, and they seem fine.

Re: Zhaoxin's KX-7000

#36

Earlier quoted context omitted.

Seems like it depends on the price point. These chips might be slow by modern standards, but if they're cheap enough then it doesn't really matter for a lot of the potential applications. I'm typing this post on a chip that is roughly in that performance bracket (an i5-3750k) that only rarely feels like the bottleneck. And this is my gaming machine.

Plus the vast majority of work computers don’t need to be particularly fast. Add a lightweight Linux distro, and that’s more than enough for paperwork.

Early into high school, I needed something to take to class, but since I already had a decent desktop at home, plus we were broke, I picked up some cheap Asus K55N; AMD A8-4500M, 4GB DDR3, etc -- nothing particularly fancy; only upgrade I did to it was removing the mechanical hard drive and swapping in my old 120GB Corsair Force GT.

I eventually upgraded, went off to university, etc. When I finally came home, I found out my mom apparently "borrowed" it, figured out how to install Ubuntu, and has been using it ever since for grading papers and what not.

No idea how much longer it will remain in use, but aside from the awful screen, ironically, honestly, I think the browser and the seemingly ever increasing resource requirements of the web will eventually be the only thing that finally causes an upgrade.

Re: Zhaoxin's KX-7000

#37

This review is an object lesson about why there is so much more to shipping a decent processor than making a CPU core with reasonable performance (and decent is being polite given that we are talking about Bulldozer-class single-threaded perf, which most folks were beyond thrilled to abandon when Zen arrived eight years ago.) The behavior of the memory controller is wild to see in this day and age. You really don't w…

This appears to be a new x86 design, but why? I thought there was good riscv-64 stuff out there now.

(Binary) compatibility? Not everyone runs Linux, most software can't be recompiled. And emulation tends to come with a heavy speed penalty.

Re: Zhaoxin's KX-7000

#38
post #6

How would use of the Kylin OS instead of Windows 11 affect the user's perception of performance?

> How would use of the Kylin OS instead of Windows 11 affect the user's perception of performance?

Windows 11 is dog slow on corporate hardware. Linux, even with bloated KDE or Gnome, is much faster.

Re: Zhaoxin's KX-7000

#39
it seems bad investment. firstly, it's an old architecure. secondly, How will they measure the efficiency of their investments?.Instead of investing in outdated architectures, they could fund universities, or support at least two or more companies in a competitive setup — that way, something much more efficient might emerge. But when a company is state-funded in a monopolistic way, it's quite hard for it to succeed. The U.S. had a reason for supporting AMD against Intel back then.

Re: Zhaoxin's KX-7000

#40

it seems bad investment. firstly, it's an old architecure. secondly, How will they measure the efficiency of their investments?.Instead of investing in outdated architectures, they could fund universities, or support at least two or more companies in a competitive setup — that way, something much more efficient might emerge. But when a company is state-funded in a monopolistic way, it's quite hard for it to succeed.…

They are doing that as well. There's a lot of investment in RISC-V: https://asiatimes.com/2025/03/china-all-in-on-risc-v-open-so...

For x86, supporting multiple companies would be more difficult, as they would need a license for the ISA (which Zhaoxin inherits from Via).

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