Discussion Mediatek SoC thread

[hemedans]

CPU energy efficiency does not look very good. The A18 Pro wins here by a long shot. And in general, the new X925 core is not very impressive.

A18 barely better, A720 is carrying X925 so hard.

 

[FlameTail]

Geekerwan's power curves for Dimensity 9400 has been released early.


Wow. GPU is so strong.

CPU power consumption went to the moon💀

 

[hemedans]

Spec2006 int for new 3nm A720, @FlameTail how does it compare to Apple E core?

 

[FlameTail]

Geekerwan's power curves for Dimensity 9400 has been released early.

View attachment 108997

GPU is genuinely impressive.

35% faster at the same peak power.

I thought power consumption will increase because it has the same core count as D9300, but the frequency was increased from 1300 MHz to 1600 MHz.

View attachment 108999
Spec2006 int for new 3nm A720, @FlameTail how does it compare to Apple E core?

Someone said Geekerwan will release the video of Dimensity 9400 today, so we could see a comparison. Till then, these are the numbers for Apple E-cores;


Edit:

 

[mvprod123]

Mediatek again ignores key ARMv9.X features like SME.

 

[mvprod123]

GPU is genuinely impressive.

35% faster at the same peak power.

I thought power consumption will increase because it has the same core count as D9300, but the frequency was increased from 1300 MHz to 1600 MHz.

Someone said Geekerwan will release the video of Dimensity 9400 today, so we could see a comparison. Till then, these are the numbers for Apple E-cores;
View attachment 109000

Edit:
View attachment 109001

It is interesting to see how much space the GPU takes up on the chip and how many ALUs it has.

 

[DZero]

Interestingly, Mediatek has only upgraded the prime core in Dimensity 9400. The other cores are same as Dimensity 9300.

D9300​	D9400​
Cortex X4 1 MB L2​	Cortex X925 2 MB L2​
Cortex X4 512 MB L2​	Cortex X4 1 MB L2​
Cortex A720 256 KB L2​	Cortex A720 512 KB L2​
8 MB L3​	12 MB L3​

This is a rare situation. No SoC vendor is quick to using ARM's new Cortex A725 core.

Mediatek held off from upgrading to A725 in the Dimensity 9400.

Tensor G4 uses last year's cores anyway (X4/A720/A520). Tensor G5 might use A725, but that's not releasing until August/September of 2025.

Qualcomm has opted to use their Oryon cores in the soon to be revealed 8 Gen 4, so they are not implementing any of ARM'S new cores, including A725.

Samsung's Exynos 2500 might be using A725, but the rumour is that it's delayed. It won't be featured in the Galaxy S25 series which comes in early 2025, but only in the next Galaxy Z Flip/Z Fold, which is 2025H2.

Hauwei's recent Kirin SoCs have been using their custom Taishan cores, in place of Cortex X/Cortex A7xx. They only use Cortex A5xx as their little core.

They added way more L2 and L3 cache, this is interesting.
Meanwhile Huawei is rumoured to use new little cores for their 9100.

 

[ikjadoon]

Geekerwan has posted [EDIT: preliminary data from an ES; the next video will be a retail sample]

 

[ikjadoon]

Geekerwan Part 2 / the benchmark video, with an upcoming phone:

 

[DZero]

The A720 improved massively. Now is really an interesting chip and I want to see how Dimensity 8400 will be.

 

[ikjadoon]

X925 is quite fast even in SPEC, which Arm had claimed had a smaller uplift vs GB6.2.





A 268V or 288V would've perhaps more apt, but perhaps those are unavailable for Geekerwan here. But, looking at power (below), I'd imagine the 268V or 288V would consume a bit more 1T power, too:


//

1T peak power draw also seems all right, but MediaTek is definitely gobbling +40% (5W to 7W) power for hardly +10% perf (est). This is the curse we'll never get rid of; 2W to 5W looks great and is a hell of a fp core.

 

[DZero]

THE DIMENSITY 8400 IS REAL!
heck, is too soon, maybe a december launch?

 

[DZero]

Mediatek Chromebook chip appears in Geekbench6;

MediaTek’s new MT8196 Chromebook SOC gets benchmarked, and it’s fast

While we're right on the cusp of finding out just how good MediaTek's new Kompanio 838 (internally known as the MT8188) will be in the new Lenovo Chromebook Duet we expect at Google's Chromebook Showcase next week, there are other MediaTek chips in development as well. One of these is the...

chromeunboxed.com

1800 Single Core/4800 Multi Core

I am not really familiar with the world of Chromebooks, but this seems like pretty weak performance for what ChromeUnboxed calls the "Most powerful Mediatek Chromebook chip ever".

I am taking this. Comparing to D8300, it goes 1400 / 4293.

The config was:

1x 3.35 GHz – Cortex-A715
3x 3.2 GHz – Cortex-A715
4x 2.2 GHz – Cortex-A510

And seems that rauru is the Chromebook version of Dimensity 8400.

rauru seems to use:

1x 2.7 Ghz - Cortex X4
7x 2.1 Ghz - Cortex A720

Reason: the single core is too high for any A7XX cores.

So, time to put my coins. D8400 will have

1x 3.0 Ghz - Cortex X4
3x 2.5 Ghz - Cortex A720
4x 2.0 Ghz - Cortex A720

All with double cache in each core. And no A5xx core and might go on tier of SD 8 Gen 2 and even reach CPU wise on tier of SD8 Gen 3.

 

[trivik12]

Impressive specs. Now I am excited for Nvidia/Mediatek combo SOC for laptops. Will be a serious player for sure.

 

[poke01]

The GPU is around the same size as M4. They could put these in laptops

 

[Nothingness]

Mediatek again ignores key ARMv9.X features like SME.

No CPU released by Arm has SME, so I wonder how Mediatek could have added SME.

 

[trivik12]

I am just stunned that the arm generic cores have way higher IPC than Zen 5 or Arrow Lake/Lunar Lake. By the time we have Zen 6 or Nova Lake in 2026 time frame, ARM will have another core out as well. We will see more of Arm based SOC beyond just mobile phone/tablets.

Also Samsung was stupid to refresh their tablets with D9300+ when D9400 was just around the corner. Just like most of their recent decisions, they have cut corners.

 

[mvprod123]

No CPU released by Arm has SME, so I wonder how Mediatek could have added SME.

Oh yes. It's strange.

https://twitter.com/x/status/1844078776961073488

 

[mvprod123]

https://twitter.com/x/status/1844056856936972510

 

[FlameTail]

I am just stunned that the arm generic cores have way higher IPC than Zen 5 or Arrow Lake/Lunar Lake.

Stock ARM cores have had better IPC than x86 peers for many recent years. The only thing holding back the performance is the lower clock speed.

By the time we have Zen 6 or Nova Lake in 2026 time frame, ARM will have another core out as well.

Two cores.
2025 : Cortex X930
2026 : Cortex X935

Also Samsung was stupid to refresh their tablets with D9300+ when D9400 was just around the corner. Just like most of their recent decisions, they have cut corners.

Truly bizarre decision.

 

[gdansk]

Truly bizarre decision

Tell me how it is bizarre. Save money buying now discounted year old SoCs and charge the same rate to customers. It's business. The SoC only needs to be good enough and D9300 is.

What's bizarre is that Samsung doesn't use tandem displays despite manufacturing them for Apple. It seems they don't consider their tablets a "flagship" product that needs the best of everything. But they price them that way anyway.

 

[jdubs03]

View attachment 108996
A18 barely better, A720 is carrying X925 so hard.

Which makes it even more confusing as to why the A725 wasn’t used. They could’ve benefited from the additional performance or power reduction at iso perf.

 

[DZero]

I am just stunned that the arm generic cores have way higher IPC than Zen 5 or Arrow Lake/Lunar Lake. By the time we have Zen 6 or Nova Lake in 2026 time frame, ARM will have another core out as well. We will see more of Arm based SOC beyond just mobile phone/tablets.

Also Samsung was stupid to refresh their tablets with D9300+ when D9400 was just around the corner. Just like most of their recent decisions, they have cut corners.

There is a rumor that the Samsung Tab seems to be delayed, making the launch frame time logic with the D9300.

 

[hemedans]

Which makes it even more confusing as to why the A725 wasn’t used. They could’ve benefited from the additional performance or power reduction at iso perf.

What if A725 don't scale well under 1W?

 

[poke01]

https://twitter.com/x/status/1844077023024775235

SME is only the X925 core

Edit:
Not true

https://twitter.com/x/status/1844078776961073488