Teardown of Doogee Mix shows MT6757CH, not MT6757T

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Summary

User furmanoff has done a teardown of Doogee Mix and found “MT6757V” imprinted on the SoC
SoC makers often use the same SoC, but with higher GPU and CPU clocks and resell them as a new SoC
“CH” is clearly printed on the chip
It’s up to MediaTek to clarify what “P25” is
The full discussion thread is here (opens in new tab)

UPDATE: There is no conspiracy here. MTK has simply clocked MT6757V higher and sold as MT6757CH. This is normal practice for CPU makers. The “CH” is clearly visible at the end of the printing on the chip. Thanks to Chris for pointing this out (see comments).

According to the the picture taken by Mr furmanoff, the information printed on the SoC is “MT6757V”, which is Helio P20.

However, let’s take a closer look and reserve judgement until further information can be obtained.

According to the printing on the chip and CPU identifying apps, the CPU is “MT6757CH”.

CPU test apps are showing the clusters running at max clocks of [email protected] and [email protected]. According to MTK, Helio P25 is “UP TO” 2.6GHz. So, with this wording, it’s POSSIBLE that some Helio P25 SoC actually are clocked at 2.4GHz max.

Also note that Helio P20 is UP TO 2.3GHz, which disqualifies MT6757CH as Helio P20.

At the moment, the clue missing is whether or not MT6797CH is denoted Helio P25 by MediaTek. And, it’s the only thing that matters in determining whether or not Doogee and Vernee are falsely representing MT6757CH.

Comments

9 responses to “Teardown of Doogee Mix shows MT6757CH, not MT6757T”

July 23, 2017

Christopher

AIDA64 crashes on all Helio P25 devices. It’s a general bug and they are not trying to hide something there. Also, as far as I know there is no way to read out GPU clock on a MTK device without having a look at the Kernel source. No way to verify that with some tool. Furthermore the frequency display of info apps matches with the one of other Helio P25 devices. I have a Vernee Mars Pro here and it’s exactly the same 4x 2.4GHz + 4x 1.69 (Sports mode).

Reply
1. July 23, 2017
  
  Damian Parsons
  
  All interesting stuff, but already covered in the post. It doesn’t answer why the chip says MT6757V…On your Vernee Mars or the Doogee Mix.
  
  It’s likely that MediaTek simply didn’t bother with properly imprinting the SoC, simply because MT6757T/CH is MT6757V, just at a higher CPU/GPU clock. Much as Intel uses the same CPUs, but rebadges the ones which are stable at higher clock speeds.
  
  Reply
  1. July 23, 2017
    
    Christopher
    
    Right, they are the same chips. And look at the picture, it clearly says CH at the end of the last line. This was added after manufacturing since they are selling unsold P20 chips as P25.
    
    Reply
  2. July 25, 2017
    
    Christopher
    
    I tore down a Vernee Mars Pro, here is the result: https://photos.app.goo.gl/rcJI7j9nTwwkqnwh1
    Looks like there are two versions of the P25: The CD and CH. The latter one likely has a bit lower frequencies and thus is a bit less powerful which is the reason for the difference in benchmark scores. Yet, all P25 seem to have the MT6757V on them – at least at the moment. MTK likely haven’t sold any chips yet that have been produced dedicated to the P25 family.
    
    Reply
    1. July 26, 2017
      
      Damian Parsons
      
      At this point we really don’t know what MT6757CH is. There’s no official information that I’ve seen. Vernee and Doogee call it P25, but Blackview is calling it P20. I consider Blackview more upstanding and serious than Doogee or Vernee, but Blackview could be incorrect as well.
      
      Reply
July 25, 2017

Manu

Hi,

I write a message on the contact formular of Mediatek. I hope that I will have an answer from Mediatek to clarify the processor who is used.

Reply
1. July 25, 2017
  
  Damian Parsons
  
  Okay Manu, please let us know what they say. I have some interesting news regarding this. Blackview BV8000 Pro is using MT6757CH too, and are marketing it as Helio P20, not P25. But this could be a marketing error by Blackview. Only MediaTek can answer for sure.
  
  Reply
August 17, 2017

jungmin

hi….
this is doogee mix user from korea.
i am searching so many posts even in youtube.
but i still couldnt find teardown videos.

the reason why i am trying to teardown is
my doogee mix battery cover has broken.
so i need to replace of it.
but i do not know how to….
can tou kindly inform me how to remove broken battery cover??
i am really serious and hanging for it..

Reply
1. August 22, 2017
  
  CharlesP69
  
  You can find in Aliexpress.com for the part. Search for Doogee mix case.
  
  Reply