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Thread: Intel haswell i7-4770K preview article-TMSHW

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  1. #10
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    Quote Originally Posted by kl0012 View Post
    Probably Sandra2013 doesn't support FMA3 yet (only FMA4), so the IPC improvements are responsible for current perf. gain.

    Impressive improvement in graphics perf. (considering that this is just GT2). Waiting for my next laptop with GT3 (or, hopefully, convertible with passive cooling).
    I was under impression that sisoft sandra was the 1st piece of desktop commercial software to support both FMA3(FMA4 on BD/PD) and AVX2.

    edit:
    From THG article:
    Why do doubles seem to speed up so much more than floats on Haswell? The code path for FMA3 is actually latency-bound. If we were to turn off FMA3 support altogether in Sandra?s options and used AVX, the scaling proves similar.
    So if they have option to turn off FMA3 code path then it's logical it actually has support for this codepath.

    edit2:
    Found this on sisoft facebook page , it definitely supports FMA3.
    We are pleased to announce the release of SP1 for SANDRA 2013! Because we managed to test Haswell (Crystal Well), we have some fixes and optimisations:

    - AVX2 integer support (Multi-Media integer, Hashing)

    - FMA3 float support (Multi-Media float/double, Memory/Cache bandwidth) [also works on Vishera]

    - TSX (HLE/RTM) support (Transaction rate)

    - eDRAM/L4 support (Memory, Cache, Latency)

    SP6 for Sandra 2012 with all the fixes and enhancements of Sandra 2013 (but not new features) has also been published.
    Last edited by informal; 03-18-2013 at 03:15 PM.

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