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Thread: First details of AMD Ryzen 5 3500 6C/6T processor leak

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    Re: First details of AMD Ryzen 5 3500 6C/6T processor leak

    6C/6T is the best configuration for DX12. Speaking of
    which, M$ were very generous in bringing DX12 to Win7,
    but it gotta be 64 bit ! To satisfy their Chinese customers.

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    Re: First details of AMD Ryzen 5 3500 6C/6T processor leak

    There'll be a fine pricing line to tread between the 3600 and 2600 (while stock lasts), or the 3400G. I figure ~50% more performance for SMT, so the only difference between this and the 3400G will be the lack of the GPU and the zen2 improvements

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    Not a good person scaryjim's Avatar
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    Re: First details of AMD Ryzen 5 3500 6C/6T processor leak

    Quote Originally Posted by Xlucine View Post
    ... the only difference between this and the 3400G will be the lack of the GPU and the zen2 improvements
    Thos Zen 2 improvments are quite impressive, though

    In the previous gen AMD didn't drop SMT until the bottom of the product stack (4C). iirc AMD do get around 50% throughput uplift from SMT (Intel only get ~ 35%), so disabling it earlier in the stack makes a bigger difference to overall performance. Judging by this leak, it looks like we won't see any 4C Ryzen 2 CPUs - they'll leave the 4 core stuff to the APUs (currently 12nm Zen+).

    I always assumed that the disabling of SMT was due to thermal binning rather than defects - SMT pushes more data through the cores so (aiui) would require slightly more voltage than running with SMT diabled? So dies that are functional but run at too high a voltage with SMT enabled can have SMT disabled to hit a thermal target? Or am I wide of the mark there?

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    Re: First details of AMD Ryzen 5 3500 6C/6T processor leak

    Quote Originally Posted by scaryjim View Post
    I always assumed that the disabling of SMT was due to thermal binning rather than defects - SMT pushes more data through the cores so (aiui) would require slightly more voltage than running with SMT diabled? So dies that are functional but run at too high a voltage with SMT enabled can have SMT disabled to hit a thermal target? Or am I wide of the mark there?
    We had mentioned thermals earlier

    Not usually binning as such, but if you want a lower TDP part then that helps cap the power usage without dropping the clocks. If cores are struggling that much to hit TDP limits I would more expect them to simply be shut off. Even at 4 cores (half disabled) a die can be used in a server part where 4 of them gives a good 16 core part.

    I agree that AMD usually turn off SMT on their entry level parts, so I guess that means that they now consider 6 cores as entry level. I can live with that.

    Some of the early 3600 benchmarks people tried switching threading off, some games went slower and some went faster but all in all it pretty much evened out. That would make a 3500 actually quite a decent budget gaming chip.

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    Re: First details of AMD Ryzen 5 3500 6C/6T processor leak

    might run super cool and super low voltage and be a mobile chip.

    the Ryzen 9 3900 65w TDP makes me sailvate though.....

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