Intel Skylake / Kaby Lake / Coffee Lake Thread - Skylake-X reviews out (page 501)

Discussion in 'CPUs and Overclocking' started by Sweepr, Apr 16, 2015.

  1. WingZero30

    WingZero30 Junior Member

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  2. Saylick

    Saylick Senior member

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    Nice find!

    The image in the article from Intel more or less confirms what we're seeing in the die shot.
    [​IMG]
    [​IMG]
    ^ I'm guessing the portions on the 2nd Column, 1st and 4th Row are Uncore.

    From AT's article (via Ian Cutress):
     
  3. raghu78

    raghu78 Diamond Member

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  4. multippp

    multippp Junior Member

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    Skylake-X on 6, 8, 10, 12-core a mesh architecture?
     
  5. jpiniero

    jpiniero Diamond Member

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    Have to agree it's 10/18/28. Whatever that is, those two blocks are not a core for sure.

    That'd be kind of a weird place to put it. Maybe some sort of secret FPGA or fixed function for the cloud guys? It would be kind of a lot of space to spend on that though.
     
  6. TahoeDust

    TahoeDust Member

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    OBR?
     
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  7. wildhorse2k

    wildhorse2k Member

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    The picture of 7980XE shows place for 20 nodes with 18 of them being cores and 2 memory controllers (those 2 look a lot different) in the mesh, in accordance with https://www.pcper.com/news/Processo...ze-Mesh-Architecture-Inter-Chip-Communication .

    So in fact MCC does allow 20 cores, but you need memory controllers too, therefore can't fit 20 cores on it, only 18.
    This means LCC will have space for 12 cores (we don't have picture of it, but I assume it will look like MCC with the 2 rightmost columns missing) and 2 nodes will be memory controllers again so 10 cores.

    I hope this clears the confusion whether the 12C will be LCC or MCC. It will be MCC.

    A better article is here http://www.tomshardware.com/news/intel-mesh-architecture-skylake-x-hedt,34806.html
     
    #12232 wildhorse2k, Jun 16, 2017
    Last edited: Jun 16, 2017
  8. WingZero30

    WingZero30 Junior Member

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    Nice observation and analysis
     
  9. JoeRambo

    JoeRambo Senior member

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    It would make more sense to cut bottom and right columns completely and have a nice square LCC die of 10C and 2mem controllers. But yeah, end result is the same, 10C on LCC.

    But of course with mesh architecture it is no longer relevant if die is LCC or MCC and MCC in fact will probably improve performance by virtue of having almost 2xLLC cache.
     
  10. Timmah!

    Timmah! Senior member

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    So you assume that there will be 2 memory controllers for 10 cores on LCC? Did BW-E have 2 of them too?

    @TahoeDust> Zdenek Obrmaier, the czech tech journalist. I assumed he is fairly known even on english speaking boards like this.
     
  11. Sweepr

    Sweepr Diamond Member

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    Nice find! Link to the full Intel blog post (by Akhilesh Kumar) below:

    https://itpeernetwork.intel.com/intel-mesh-architecture-data-center

    Up to 28C/56T, AVX-512, native dies with mesh architecture, all-core Turbos >3.2 GHz (14nm+), among other changes from Broadwell-EP.
     
  12. Atari2600

    Atari2600 Senior member

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    Stumbled across this and thought it might be useful to link back.

    In cinebench at least, it looks like the 7% is without SMT. With SMT, Zen is actually slightly ahead of Kaby Lake in IPC.
     
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  13. JoeRambo

    JoeRambo Senior member

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    In apples to apples it is ~10% ST in Cinebench.

    https://www.extremetech.com/computi...-reviewed-taking-fight-intel-mid-range-market

    I like this review cause it is running both contenders as people would run them ~DDR3200 and one can see the following interesting points:

    1) 7500 with DDR4 @2400 gets destroyed by SMT enabled 7700K with 3200 mem. 7700 is almost TWICE as fast in some of the tasks.
    2) Handbrake tests show that program is coded to make use of Intel's CPU resources in vector processing ( full 256bit path ), Ryzen has quite a disadvantage here. So 8 core RYZEN vs 8 core Intel will be at same IPC dissadvantage in those types of apps.
    3) Something in Dolphin emu code does not like Ryzen CPU, giving Intel unexpected IPC advantage ( one that could go away with some optimization ).
    4) And in games results speak for themselves, 3200 mem equipped 7700K is a beast that is up to 50% faster. ( i know all frames rates are "playable" but CIV turn speed or EU4 sim speed matters)
     
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  14. tamz_msc

    tamz_msc Golden Member

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    Handbrake H.264 doesn't scale very well with cores, plus it is obviously going to depend on the file being encoded. Hence focusing on results from one website doesn't tell the whole story.
     
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  15. JoeRambo

    JoeRambo Senior member

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    And? Not every workload is fully parallelizable, and we are discusing "IPC" here, 1C vs 1C. If anything x264 developers are considered optimization demigods, cause substantial percentage of their app is in optimized assembler code.
    The "whole" story should include factors like pricing etc. But claiming that Ryzen is within 7% ST of Skylake is not true in quite "a few" workloads either.
     
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  16. tamz_msc

    tamz_msc Golden Member

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    [​IMG]
    Divide the the frame/s score with the base clocks, the 7700K is ~9% ahead of the 1500X in terms of IPC. The "whole story" in this case means focusing on one result instead of looking at the bigger picture.
     
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  17. JoeRambo

    JoeRambo Senior member

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    Picking one point of four, ignoring "apples to apples" part and then blaming someone for "not looking at bigger picture" ? o_O
     
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  18. tamz_msc

    tamz_msc Golden Member

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    This is apples to apples as well, tested at DDR4 2400 CL15. H.264 is a more representative example than Dolphin because there are far more people doing video transcodes than Dolphin emulation.

    "Gaming" isn't a good way of measuring IPC.
     
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  19. multippp

    multippp Junior Member

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  20. coercitiv

    coercitiv Golden Member

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    The overclock itself is good news, but the "auto" voltage setting is not necessarily a positive thing.
     
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  21. Sweepr

    Sweepr Diamond Member

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    Hexus (broke the NDA?) posted some tests:

    [​IMG]

    [​IMG]

    [​IMG]

    ''...a 10-core powerhouse offering excellent IPC performance and outstanding multi-core potential in a single $999 chip armed with plenty of overclocking headroom.''

    10C Core i9-7900X beat their 10C Core i7-6950X sample by 28% @ CB R15 MT and 43.5% @ Handbrake. 4.7 GHz was possible for all cores with 1.25V, which improved performance by ~14% in Cinebench. They didn't disclose the MB or BIOS they got to test, and some results hint it might not be 'final work' - probably explains why it was posted this early.

    http://hexus.net/tech/reviews/cpu/107017-intel-core-i9-7900x-14nm-skylake-x/

    Anyway, nice teaser for the more in-depth / technical reviews on monday.
     
    #12247 Sweepr, Jun 16, 2017
    Last edited: Jun 16, 2017
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  22. LTC8K6

    LTC8K6 Lifer

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    "Still, a stable 4.7GHz across 10 cores at 1.25V is an impressive feat"

    Hexus quote.
     
    #12248 LTC8K6, Jun 16, 2017
    Last edited: Jun 16, 2017
  23. exquisitechar

    exquisitechar Member

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    Great to see that the OC headroom is as great as expected, unlike those initial BS rumors.

    Looking forward to 6c/12t Coffee Lake!
     
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  24. MarkPost

    MarkPost Junior Member

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    So whats the real clock for all cores? 4.0? 4.2?