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Intel Core i5 750, Core i7 870 Linux Benchmarks

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  • Max Spain
    replied
    If you look at some of the benchmarks, AMD has tended to be superior in anything involving cryptography, but I am still surprised to see a lowly AMD X3 pwn the bejeezus out of Intel's latest and greatest so frequently

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  • Michael
    replied
    The amd tricore was used since that is just what was available...

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  • Apopas
    replied
    Originally posted by Kjella View Post
    Conclusion, new core i5/i7 work terribly under Linux.
    Or maybe, Phenom work terribly under Windows

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  • suokko
    replied
    Originally posted by lem79 View Post
    Phoronix is probably also the only site benchmarking on Linux? And using GCC instead of the Intel C compiler? I don't know if ICC still does dodgey stuff with checking CPU vendor strings etc, or if the version of GCC used doesn't properly support Nehalem ... but the results here should be a genuine representation of what they are. I doubt anyone went to any length to rig these results.
    I wouldn't be surprised if icc is still doing some Intel only optimizations. It would be interesting to see difference wiht icc compiled tests to gcc compiled with all icc optimizations enabled. (I think some of optimizations would require some compiler switches.)

    gcc has many contributions from amd while Intel only recently started contributing to gcc.

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  • Dragoran
    replied
    What is important to keep in mind though is that Intel Turbo Boost Technology was disabled on the processors during testing, since this functionality had not worked under Linux for increasing the clock frequency but instead appeared to cause some sporadic performance problems.
    Err.. what?

    Turbo mode does not really depend on the OS, and works fine on my i7 920.
    And of course without turbo mode the single threaded performance is not quiet as good as it supposed to be, also comparing apples with oranges (quad vs. triple core) does not make the test very useful.

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  • lem79
    replied
    Phoronix is probably also the only site benchmarking on Linux? And using GCC instead of the Intel C compiler? I don't know if ICC still does dodgey stuff with checking CPU vendor strings etc, or if the version of GCC used doesn't properly support Nehalem ... but the results here should be a genuine representation of what they are. I doubt anyone went to any length to rig these results.

    Leave a comment:


  • Apopas
    replied
    Originally posted by vermaden View Post
    These whole benchmarks just compare Intel i5 to Intel i7 CPUs performance and nothimg more
    That's the title of the benchmark after all. i5 750 vs i7 870 and not Intel vs AMD.

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  • Kjella
    replied
    Conclusion, new core i5/i7 work terribly under Linux. Least that's the only conclusion I can draw compared to everything I read at Anandtech.

    Here's their main conclusion:
    "I'll start this conclusion with what AMD must do in response to Lynnfield. The Core i5 750 is a great processor at $196, in fact, it's the best quad-core CPU you can buy at that price today. In nearly every case it's faster than AMD's Phenom II X4 965 BE, despite the AMD processor costing almost another $50." (...) "The Core i7 870 gets close enough to the Core i7 975 that I'm having a hard time justifying the LGA-1366 platform at all."

    In short, the results I'm seeing here do not make sense. There's not a single case of the many, many Windows benchmarks where the i5 would lose to an triple-core processor.

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  • Hohlraum
    replied
    I think the only thing these benchmarks show is that Stream is the only software that accurately represents the performance of these processors over the AMD. I don't dislike AMD but I find it highly unlikely that it out performs ANY i7 processor on the market. If that is the case then Phoronix is the only review site I've ever seen that has come to this conclusion.

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  • suokko
    replied
    Looks like phenom is very fast core but lags in memory bandwidth so test that are memory limited are lose to AMD processors.

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