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Thread: The future is/seems APU

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  1. #15
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    Quote Originally Posted by drezha View Post
    Also, whilst the AMD chips are pretty good at TDP, they are unfortunately, significantly slower (I believe they're compiled with Intel compiler which could explain things - I've seen stories around the web that the Intel compilers cripple speeds on non Intel chips).
    Actually the software people are using is mostly compiled using Intel compilers -whether games, bench marks or scientific applications- while it is a proven fact that the Intel compilers cripple non-Intel CPUs by excluding them from the more sophisticated instructions and forcing them to take the long road while computing, e.g. allowing no more recent innovations than SSE2. It was a big scam when Bulldozer CPUs did not seem able to perform AVX instructions, while technically they should be able to perform them. It was then that investigators into that matter found out that the Intel compiler used only would allow AVX instructions on Intel CPUs....

    "The Intel compiler and several different Intel function libraries have suboptimal performance on AMD and VIA processors. The reason is that the compiler or library can make multiple versions of a piece of code, each optimized for a certain processor and instruction set, for example SSE2, SSE3, etc. The system includes a function that detects which type of CPU it is running on and chooses the optimal code path for that CPU. This is called a CPU dispatcher. However, the Intel CPU dispatcher does not only check which instruction set is supported by the CPU, it also checks the vendor ID string. If the vendor string is "GenuineIntel" then it uses the optimal code path. If the CPU is not from Intel then, in most cases, it will run the slowest possible version of the code, even if the CPU is fully compatible with a better version."
    More....

    So if you feel cheated by AMD for your poorly running FX CPU, you might actually be cheated by the very code you're running...
    Last edited by Dirk Broer; 11-23-2013 at 08:39 AM.


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