Tuesday, February 13th 2024
Loongson 3A6000 CPU Reportedly Matches AMD Zen 4 and Intel Raptor Lake IPC
China's homegrown Loongson 3A6000 CPU shows promise but still needs to catch up AMD and Intel's latest offerings in real-world performance. According to benchmarks by Chinese tech reviewer Geekerwan, the 3A6000 has instructions per clock (IPC) on par with AMD's Zen 4 architecture and Intel's Raptor Lake. Using the SPEC CPU 2017 processor benchmark, Geekerwan has clocked all the CPUs at 2.5 GHs to compare the raw benchmark results to Zen 4 and Intel's Raptor Lake (Raptor Cove) processors. As a result, the Loongson 3A6000 seemingly matches the latest designs by AMD and Intel in integer results, with integer IPC measured at 4.8, while Zen 4 and Raptor Cove have 5.0 and 4.9, respectively. The floating point performance is still lagging behind a lot, though. This demonstrates that Loongson's CPU design can catching up to global leaders, but still needs further development, especially for floating point arithmetic.
However, the 3A6000 is held back by low clock speeds and limited core counts. With a maximum boost speed of just 2.5 GHz across four CPU cores, the 3A6000 cannot compete with flagship chips like AMD's 16-core Ryzen 9 7950X running at 5.7 GHz. While the 3A6000's IPC is impressive, its raw computing power is a fraction of that of leading x86 CPUs. Loongson must improve manufacturing process technology to increase clock speeds, core counts, and cache size. The 3A6000's strengths highlight Loongson's ambitions: an in-house LoongArch ISA design fabricated on 12 nm achieves competitive IPC to state-of-the-art x86 chips built on more advanced TSMC 5 nm and Intel 7 nm nodes. This shows the potential behind Loongson's engineering. Reports suggest that next-generation Loongson 3A7000 CPUs will use SMIC 7 nm, allowing higher clocks and more cores to better harness the architecture's potential. So, we expect the next generation to set a bar for China's homegrown CPU performance.
Sources:
Geekerwan, via Tom's Hardware
However, the 3A6000 is held back by low clock speeds and limited core counts. With a maximum boost speed of just 2.5 GHz across four CPU cores, the 3A6000 cannot compete with flagship chips like AMD's 16-core Ryzen 9 7950X running at 5.7 GHz. While the 3A6000's IPC is impressive, its raw computing power is a fraction of that of leading x86 CPUs. Loongson must improve manufacturing process technology to increase clock speeds, core counts, and cache size. The 3A6000's strengths highlight Loongson's ambitions: an in-house LoongArch ISA design fabricated on 12 nm achieves competitive IPC to state-of-the-art x86 chips built on more advanced TSMC 5 nm and Intel 7 nm nodes. This shows the potential behind Loongson's engineering. Reports suggest that next-generation Loongson 3A7000 CPUs will use SMIC 7 nm, allowing higher clocks and more cores to better harness the architecture's potential. So, we expect the next generation to set a bar for China's homegrown CPU performance.
21 Comments on Loongson 3A6000 CPU Reportedly Matches AMD Zen 4 and Intel Raptor Lake IPC
'On this CPU, tasks still take a bit loong son'
I'll see myself out now
Products from the major manufacturers in this CPU power is about 5W at MAX
Good luck selling this thing outside of CN government contracts driven by patriotism.
Security through obscurity.
Yeah, I can make a car just as good as yours. It's going to weight five times as much, consumed fuel will be something akin to a boat (gallons per mile, instead of miles per gallon), but the interior will be just as comfortable and luxurious as a middle-tier Honda. What, that's not really viable? The car we've designed isn't really a socketable replacement and thus would also require its own redesigned roadway with lanes 30% wider. Yeah, but all of these are small details....look at that interior.
I see this collapsing. It's exactly the same proposition as changing instruction sets...and decades later after RISC we still run x86. Sometimes in demonstrating that "you don't need" a thing you highlight why it's necessary. I'd suggest that this CPU does exactly that...and the Chinese market isn't deep enough to support an entirely different and significantly less efficient chip that will likely never be able to be produced in enough volume to ever actually support a separate market. Funny that...it's almost like the core issue is that to succeed you might need more than one "equal footing" claim with a mile of qualifiers and an insufficient manufacturing volume to create your own independent market that will have to compete with the incumbent. It's almost like why ARM is so big because it created its parallel market focusing on an emerging market (mobile) and extreme niche (power efficiency) to carve out something x86 couldn't competed with...and this new processor is, by their definition, gunning for direct competition with established and easily better hardware.
Maybe if these things are dirt cheap, and rapidly iterate, they've got a chance. I...just don't see it. What I see is another claim from a company that wants the world but will flame out when they realize what it costs to genuinely compete. Please note that a decade ago the news stories were about how China was going to have their own home grown processors and OS for governmental entities. It's 2024...and the story now is that soon they'll compete with western tech. In both cases the evidence was basically a technical demonstration without any additional plans beyond "we'll throw money at it." A story that always ends in failure because all that thrown money lines pockets until the project is eventually buried as a "success" that looks more like a failure. Talk about "with Chinese characteristics" being the kiss of death.
if you cut out advertisements with an add blocker you can be very productive with 15 year old hardware
Major manufacturers had 2.5GHz CPUs even at 130nm process era.
This 3A6000 must he limited by other aspects (like FSB) so the clock speed maxed at 2.5GHz without breaking other things.
Further, Zen 4 level PPC means it's more than 50% faster per clock than the Haswell in that i5, thus a 2.5GHz 3A6000 is equal or even slightly better than your 3.7GHz i5.
Competition-wise, even being just 1 year behind is serious deficiency, but in the big picture, reaching Golden Cove/Zen 4 levels are respectable.SPEC is a complicated enough benchmark that it reflects modern usage cases pretty well, especially the 1T Int part.
Also, more than brute force is needed for high PPC, otherwise everyone would have done it already. 2.5GHz quad core Zen 4 is more than enough for replacing for vast majority of use cases when the inevitable full sanctions against China is implemented after WWIII starts, and having a fast CPU ends up being the LAST thing anyone cares about.
The i5 4690 has a listed TDP of 84W which I have tested it extensively and all core loads put it at about 50W max unless you're running a specific power virus and then it only gets to about 60W. That is its actual power draw. Intel's current philosophy of draw as much power as your PSU can handle at all costs was not always the case.
Even the higher spec i7-4790 (also 84W TDP) doesn't exceed 65W (75W for power virus) in all work scenarios and I have 4 copies of that CPU which perform similarly.Looking at CPU-Z single core (easiest thing to quickly find), Zen 4's IPC is less than 20% higher than Haswell. Per Clock. Modern performance is as much about increased clock speed as same-speed instruction issue. Sure, other benchmarks will put the difference higher than CPU-Z but that's on you.
And IPC wasn't the point. The point was power efficiency which Haswell has all over this new CPU, on a fatter node at higher clocks. It's new and they will improve it but right now it's very inefficient. Apple has shown that you can focus efficiency instead of clock speed and achieve good performance and this processor hasn't done that yet. But I'm sure they will continue to improve it, we'll see how it goes.
If you want to try a CPU other than I A, you can expect the Zhaoxin KX7000. It uses X86 ISA, 8 "世纪大道" cores, can run Windows even crysis. It's more like a "to c" product. It is manufactured by 7nm from SMIC, single core matches 3770K, and multi core matches 10400 (maybe).