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IanCutress

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Posts posted by IanCutress

  1. Code is not public, same reason FM doesn't make its code public :D I suggest getting a book or two ofc.

    I get a portion of my computational code from back when I did my PhD, as such it's based on real life problems.

    As long as your buddy is proficient in C++, have a look at n-body simulations. Those are always interesting and taxing, or black-scholes for finance. It's a case of picking up an algorithm and having a go. A strong background in mathematics always helps, especially when writing optimised code :thumb:

  2. Got my head around some C++ AMP at the weekend and wrote a benchmark for DX11 GPUs that probes some of the computational aspects in grid solvers.

     

    i33225hd79701600c9.png

     

    Each stage lasts for 30 seconds - CPU score is designed to be less than 5% of the overall grade, but as always having a fast CPU helps keep the GPU fed. AMD doesn't fair too well, but that's more a weakness of the DX11 API with C++ AMP for this sort of thing.

     

    Download below and feel free to test!

     

    // System Compute
    // (c) 2012 Ian Cutress
    //
    // System Compute is a benchmark designed to stress the CPU and AMP device of the system
    //
    // Changelog
    //
    // v0.4 : Added CPU detection 
    // v0.3 : Added AMP MatMul
    // v0.2 : Fixed Score calculation
    //		: Added 2D IMP CPU
    //		: Made it look nicer
    // v0.1 : Initial Build
    //		: 2D-CPU
    //		: 3D-CPU
    //		: 2D-AMP
    //		: 3D-AMP

     

    Still need to add result verification tools.

     

    systemcomputev04results.png

    SystemComputev0.4.zip

  3. There are more than 3 guyz, all say its not possible!

     

    So now there are 4 Guyz that can confirm this VS isnt possible

     

    This is quite positively the worst argument I have ever heard. 'X people said it, so it must be true!'

     

    Please Mr Moose, come back with evidence.

     

    You yourself continuously state that sometimes VS is high and 'it isn't a bug' but just sometimes you score higher. If that is the case then apply some damn statistics, work out your mean and standard deviations for a distribution curve, and actually calculate the possibility of a score getting so high on one of these 'golden runs'.

     

    Things that happen 1 in 64,000,000 times actually happen pretty often. To say otherwise is to severely underestimate the number of things that happen.

  4. Its an part of System driver/Software;)

     

    There are lots of things we ban which are part of the driver/software. Mipmap for example. Please stop using this as an argument. It's done on a case-by-case basis.

     

    I still reckon that having 1300+ MB/s for VS with only two SSDs is an anomalous result, when total sequential of two in RAID-0 is only 1000MB/s. The write back cache only affects the writing to the memory, though I fear that is what PCMark actually detects rather than the full write through. Would be interesting to see how much it actually effects by profiling the functions

  5. VS can get crazy on RST sometimes, but in good Moments areca can score 2G VS too.

     

    'Good Moments' are often called 'bugged runs' in the world of 3D. If this RST glitch happens 1 in 20, then anyone could set up a 3D run on a card that bugs 3D01 one time in 20. But in 3D we see it as a black screen and call it a bug. In PC05, it's not that easy to see, but if it's 1 in 20, then we should be calling it a bugged run due to the inflated score.

     

    I still don't see how two SSDs can hit 1300 MB/s with RST without something going on. Even with write back and them being clean. That's technically faster than the two drives could do together.

  6. taking this example - link : StrategosSan comments that he only used 2 x Crucial M4 SSDs and his virus scan result exceeds the phisical limit of the drives let alone the translation into pc05.

     

    software cacheing looking to be deemed AOK.. this is a real surprise and a dissapointing ruling.

     

    I agree. Strat gets:

     

    HDD - Virus Scan 1310.47 MB/s

     

    for using only two SSDs on ICH. I couldn't even get that using two ACARDs (http://hwbot.org/submission/2327525_borandi_pcmark_2005_core_i7_3960x_43966_marks), so something isn't right here.

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