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32 bit and 64 bit

  • 29-12-2010 1:06pm
    #1
    passingthrough
    Registered Users, Registered Users 2 Posts: 529 ✭✭✭


    just been wondering about this, if i have a 64 bit machine am i better off installing 32 bit or 64 bit programmes (CAD etc). just wondering would a 64 bit work faster with a 32 bit programme or does it even work like that?
    thanks


Comments

  • #2
    BrokenArrows
    Registered Users, Registered Users 2 Posts: 7,498 ✭✭✭BrokenArrows


    you will be better off installing a 64bit program on a 64bit machine.

    a 32bit program on a 64bit machine will only run using 32bits.


  • #3
    passingthrough
    Registered Users, Registered Users 2 Posts: 529 ✭✭✭passingthrough


    BrokenArrows wrote: »
    you will be better off installing a 64bit program on a 64bit machine.

    a 32bit program on a 64bit machine will only run using 32bits.

    Thanks for that


  • #4
    Overheal
    Registered Users, Registered Users 2 Posts: 85,283 ✭✭✭✭Overheal


    Very few processors on the mainstream market are 32-bit exxclusive anymore; 64-bit OSs are backwards compatible with 32-bit programs


  • #5
    smjpl
    Registered Users, Registered Users 2 Posts: 77 ✭✭smjpl


    You can have the occasional problem with 32bit programs on 64bit machines. Its better to stick with 64 on 64.


  • #6
    RoyalMarine
    Closed Accounts Posts: 5,824 ✭✭✭RoyalMarine


    smjpl wrote: »
    You can have the occasional problem with 32bit programs on 64bit machines. Its better to stick with 64 on 64.

    i have win 7 x64.
    the x64 programs give me more trouble than the x86 ones.


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  • #7
    ED E
    Registered Users, Registered Users 2 Posts: 36,169 ✭✭✭✭ED E


    Signed drivers can be troublesome but its not usually an issue.


  • #8
    Naikon
    Closed Accounts Posts: 4,564 ✭✭✭Naikon


    Basically, unless the software is written to specifically use the facilities provided by the 64 bit instruction set, you are unlikely to see much of a performance
    boost for general day to day usage. Encoding or other cpu heavy programs will benefit, not games or your web browser. Another big plus with 64 bit, is that
    you aren't going to suffer from the "year 2038" problem. 2^64 is an insanely big number after all...

    Keep in mind, a pure 64 bit enviroment will require 32 bit libraries and a thunking mechanism to override 64 bit libs when you want to run a new 32 bit process.
    This has overheads associated with having to support 32 bit processes. It is basically impossible to have a 64 bit program link at the code with a 32 bit one, unless
    you count IPC mechanisms. Being a bit overly techie here, but tl;dr - not a huge benefit mainly, but it's best to move to 64 bit at some stage. Besides, the first 64
    bit OS was released way back in 1985. Go figure.


  • #9
    Ironbar
    Registered Users, Registered Users 2 Posts: 161 ✭✭Ironbar


    Adobe CS5 is a good example:

    Photoshop in 64-bit is starting about 10secs faster than 32-bit version on my Win7 Ultimate x64. But you also need the RAM to run it fast (I have 8GB).


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