AMD announces Radeon M300 series notebook video cards

Discussion in 'Gaming (Software and Graphics Cards)' started by octiceps, May 6, 2015.

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  1. Cloudfire

    Cloudfire (Really odd person)

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    R9 M370X have not been announced by AMD. Just bragged by Apple as "80% faster bla bla bla".

    More unannounced cards revealed through drivers this month:

    AMD6646.1 = 'AMD Radeon (TM) R9 M385
    AMD6646.1 = "AMD Radeon R9 M280X

    AMD6647.1 = 'AMD Radeon (TM) R9 M380
    AMD6647.1 = "AMD Radeon R9 M270X
     
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  2. R3d

    R3d Notebook Virtuoso

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    Just FYI, Windows and OSX are both operating systems, which may or may not have a GUI (OSX can be run with only a CLI, iirc). An instruction set is the set of commands that a processor is capable of understanding (e.g. ARM, x86), not a set of instructions that make up a program ( so it doesn't really make sense to say an OS runs instruction sets). Also, in modern out-of-order CPUs there's no guarantee that, even if you run programs with the exact same instructions in the exact same order (which is unlikely to begin with since Windows and OSX use different APIs for most things), the processor will execute them in the same way.

    But yes, boost frequencies should be OS agnostic. From what I've seen, 3/4 core boost frequencies are typically 200mhz under the 1 core boost frequency, so 3.8ghz for 3-4 cores sounds right (and this is also what notebookcheck reports). I don't see any reason why a 4980HQ in a Macbook can't hit 3.8ghz on 4 cores for a short period (though obviously it would be unable to maintain 3.8ghz for long periods due to lack of thermal headroom).
     
  3. D2 Ultima

    D2 Ultima Livestreaming Master

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    Fair enough, however the instruction sets are in fact what cause the load to be what it is. Even if you run it out of order, the instructions being run are the same. It shouldn't make any matter of efficiency.

    As for the boost frequencies, I always thought that the 4980HQ was 3.8GHz on 4 cores, but as far as what I had come to find out from actual owners, it was 3.6GHz for 4 cores. Unless I found something exceedingly wrong somewhere in my research. If someone has it and can show me a screenshot from XTU with the default settings I'd believe it, but as far as I know it goes as I listed it above.

    Finally, the TDP limits, the software the mac uses to throttle the CPU before it gets to loud-fan-range or overheat-range and finally the lack of heat mean that anything even halfway-heavy in load wouldn't work. Maybe for a few seconds?
     
  4. octiceps

    octiceps Nimrod

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    Not rocket science. Just look at the 2nd and 3rd number in every R9 mobile GPU name.

    6x or 7x: Cape Verde (640 shaders)
    8x: Bonaire (768-896 shaders) example
    90: Pitcairn (1280 shaders)
    95: Tonga (2048 shaders)

    http://www.amd.com/en-us/products/graphics/notebook/r9-m200
     
  5. Game7a1

    Game7a1 ?

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    Didn't know AMD's stock m280x was so crippled, it ran at 110 MHz as opposed to 1000 MHz.
    But seriously, the m280x in the ASUS laptop doesn't match the official specs. In fact, they match the specs of this m270x. Just something I now noticed.
     
  6. octiceps

    octiceps Nimrod

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    AMD's official specs list R9 M270X as a 640-shader Cape Verde. M280X core clock typo aside, I'd sooner trust AMD than TPU, who consistently prints a lot of mistakes. It doesn't make sense from a logical POV either. Why would M270X have more shaders than M275? Desktop 260X certainly doesn't have more shaders than 265.
     
  7. Game7a1

    Game7a1 ?

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    Well, according to Cloudfire and AMD (through the drivers), there's a m380 that is a rebrand of the m270x, and that m270x is different from the usual one.
    AMD6646.1 = "AMD Radeon R9 M280X"
    AMD6647.1 = "AMD Radeon R9 M270X"
    ...
    AMD6820.1 = "AMD Radeon R9 M275X"
    AMD6821.1 = "AMD Radeon R9 M270X"
    AMD6822.1 = "AMD Radeon E8860"
    AMD6823.1 = "AMD Radeon R9 M265X"
    So to answer your question, it's because AMD labelled it so.
    @Cloudfire, question. Where does one find these identifiers?
     
  8. Link4

    Link4 Notebook Deity

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    Looks like AMD's mobile GPU numbering is even more of a mess than I thought. Also judging from those numbers it seems that 66XX GPUs are Bonaire based and 68XX variants are Cape Verde. So since 6646 is full Bonaire with 14 CUs, the 6647 must be 12 CUs and 768 SPs.
     
  9. Splintah

    Splintah Notebook Deity

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    Wow amd hasn't released a new mobile GPU since the 7970m... how pathetic
     
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  10. octiceps

    octiceps Nimrod

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    The Bonaire-based ones are newer. Tonga (M295X) is even more recent.
     
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