MSM8974 or MSM8974AB?
MSM8974: Adreno 330 @ 450Mhz and dual channel LPDDR3 @ 800Mhz
MSM8974AB: Adreno 330 @ 550Mhz and dual channel LPDDR3 @ 933Mhz
That brings us to the Galaxy S 4. It's immediately apparent that something is different here because Samsung is shipping the Snapdragon 600 at a higher frequency than any other OEM. The Krait 300 cores in SGS4 can run at up to 1.9GHz vs. 1.7GHz for everyone else. Curiously enough, 1.9GHz is the max frequency that Qualcomm mentioned when it first announced Snapdragon 600.
Samsung is obviously a very large customer, so at first glance we assumed it could simply demand a better bin of Snapdragon 600 than its lower volume competitors. Looking a bit deeper however, we see that the Galaxy S 4 uses something different entirely.
Digging through the Galaxy S 4 kernel source we see references to an APQ8064AB part. As a recap, APQ8064 was the first quad-core Krait 200 SoC with no integrated modem, more commonly referred to as Snapdragon S4 Pro. APQ8064T was supposed to be its higher clocked/Krait 300 based successor that ended up with the marketing name Snapdragon 600. APQ8064AB however is, at this point, unique to the Galaxy S 4 but still carries the Snapdragon 600 marketing name.
If we had to guess, we might be looking at an actual respin of the APQ8064 silicon in APQ8064AB. Assuming Qualcomm isn't playing any funny games here, APQ8064AB may simply be a respin capable of hitting higher frequencies. We'll have to keep a close eye on this going forward, but it's clear to me that the Galaxy S 4 is shipping with something different than everyone else who has a Snapdragon 600 at this point.
The wiki snapdragon chipset shows the AB s800 only in xiaomi mi-3
The official note 3 global site only says 2.3 ghz quad-core processor....not mentioning what quad-core...
so it's 50-50......since they both have identical frequencies...here is for hoping for the best) AB version!
Hopefuly you are right!
Actually I looked into this some more - the network guy I was in contact with said it was the AB binning as it was clocked at 2.3Ghz. I took that as read and hence posted that information here, however I see even at the 2.3Ghz clockspeed it looks like there are two binnings for the GPU speed. Bottom line I can't categorically state this is AB bin, my apologies for that - OP updated.
Here is what the Voodoo Report says, as you can see it depends on whether the 0007 revision corresponds to the AB bin:
Hardware : Qualcomm MSM 8974 (Flattened Device Tree)
Revision : 0007
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