32 Bit or 64 Bit

Discussion in 'MacBook' started by AlexM-1997, Jan 1, 2011.

  1. AlexM-1997 macrumors member

    Dec 31, 2010
    Hi i recently posted a topic about gaming and i was trying to work out what the best (yet staying cheap by the way) windows OS i would need for gaming using boot camp,whilst i was searching i found out something called bit.
    I would like to know what it is,what bit do i need (i"m using the latest white macbook) and how it effects gameplay
  2. vistadude macrumors 65816

    Jan 3, 2010
    Use 32 bit windows if you have 4 GB RAM or less, and use 64 bit if you have 5-8 GB RAM. 64 bit basically allows you to use more ram, but takes a performance hit if you're less than 4 GB RAM.
  3. Detrius macrumors 68000

    Sep 10, 2008
    Asheville, NC
    I've not heard of this performance hit based on the amount of RAM you have. However, the 32-bit version of Windows is limited to an address space of 4GB, but this doesn't mean that it can use 4GB of RAM--it can't. In actuality, it's limited to somewhere between 2GB-3GB, depending on hardware configurations. Additionally, your processor has to be capable of running 64-bit software. If you have an older Intel Mac that has either a Core Solo or a Core Duo processor, then your machine isn't 64-bit anyway. The Core2 Duo or better is required to use 64-bit software.

    Lastly, the 64-bit version of XP isn't really Windows XP, and the 32-bit version of Vista never should have been released, as Vista really needs more than 32-bit addressing is capable of providing. 64-bit in general should be slower than 32-bit since it's twice as much data, but Intel did 32-bit so poorly that 64-bit is actually a little faster in general. Additionally, more RAM is always better, so if your machine is capable of handling more than 3GB of RAM, then 64-bit is more future-proof.

    As you can see, it's not a straight-forward answer.

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