basic primer: how to effectively decide between imacs

Discussion in 'iMac' started by whichimac, Mar 24, 2018.

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  1. whichimac, Mar 24, 2018
    Last edited: Aug 19, 2018

    whichimac macrumors member

    Joined:
    Mar 19, 2018
    #1
    from this,

    https://forums.macrumors.com/threads/imac-2017-27-best-value-model.2086434/#post-25908560

    and from this,

    https://forums.macrumors.com/threads/display-size-on-making-betterdecisions.2111056/


    inspires this,

    the net value of using an imac = relative degree of value : needs

    a good heuristic of when an imac is effective = if the value of using an imac is 5% above your needs

    * we give 5% for the unpredictable unknowns of the future


    1. we need good tests to find out the value of using an imac

    tests lead to a benchmark, which is a data point, or some metrics (see https://en.wikipedia.org/wiki/Benchmark_(computing) )

    this type/kind of testing is call https://en.wikipedia.org/wiki/Benchmarking


    for example, this is a benchmark for mac 27 - geekbench.com/blog/2017/06/imac-27-inch-performance-june-2017/

    dunno how reliable this test is

    do you know what is the most reliable test for imacs out there?


    2. we also need to know the basic needs

    seen on the main post - https://forums.macrumors.com/thread...xperienced-users-it-would-be-helpful.2110913/


    --

    better test gives us better ideas of the value of an imac

    bad tests -> bad data/metrics
    good tests -> more reliable data/metrics

    for example,

    * if we say the data/metric of the market share of various desktop oses = how good an os is
    * then win10 is significantly better than all the other desktop oses

    a popularity data based on total quantity does not reliably tell us how good an os is, or that it is 80% better relative to the other oses (see https://en.wikipedia.org/wiki/Usage_share_of_web_browsers#Differences_in_measurement)

    let's take chrome as an example,

    * with web clients, chrome is free, and all other options are free

    * this makes for a more equal comparison of the value of web clients to the users

    but apple products cost more than microsoft products, so that's (likely?) a significant difference, and thus not an equal comparison


    a) tests are helpful when they measure what matters

    chrome uses more resources than firefox (total quantity),

    * but as an article says, "what matters is if the resources are used well".

    for web clients, it's not about the total quantity of resources used, it's about "responsiveness, which is what matters to pretty much all users"


    b) good tests are up to date, bad tests are outdated

    google made a test call 'octane' as a better replacement of 'sunspider', but it's now outdated (see https://arstechnica.com/information...chmark-because-everyone-is-basically-cheating)


    c) many tests are not representative or reflective of real life usage & significance (aka: they're flawed & meaningless)

    "This has led to browser makers focusing on edge cases that never matter in the real world" (from an article)


    --

    the net value of using an imac = relative degree of value : needs

    a good heuristic of when an imac is effective = if using an imac is 5% above your needs

    * we give 5% for the unpredictable unknowns of the future


    1. we need good tests to find out the value of using an imac

    2. we also need to know the basic needs

    then divide


    =======

    to sum up,


    effectiveness & tests - a primer on how to decide between imacs



    ---

    click to see all posts here: https://forums.macrumors.com/members/whichimac.1123719/
     
  2. colodane macrumors 6502a

    colodane

    Joined:
    Nov 11, 2012
    Location:
    Colorado
    #2
    Wow, you must have a lot of time on your hands!

    Here are the facts as I see them for 90% of buyers:
    Apple has a fairly limited range of iMacs (not looking at Mac Pro)
    Always buy SSD in capacity of your choice
    Unless you are into gaming, video editing, etc. , always buy i5 processor
    If you want 27 inch, buy your own RAM
    When all is said and done, you will pay between $2K and $4K
     
  3. Fishrrman macrumors P6

    Fishrrman

    Joined:
    Feb 20, 2009

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