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Does Windows 7 64 bit Use More Energy than the 32 Bit Version?

Discussion in 'BlackHat Lounge' started by LOL-Blaster, Oct 22, 2012.

  1. LOL-Blaster

    LOL-Blaster Regular Member

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    Does Windows 7 64 bit Use More Energy than the 32 Bit Version?

    I can find the answer with google. It's shit nowadays.
    So thanks and +2 rep for whoever can put an end to this question once and for all.
     
  2. Kharis

    Kharis Regular Member

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    what do you mean by energy? i wouldn't think one would use more power than the other

    as far as a i know the only difference processor wise is the ability to utilize more ram on 64bit
     
  3. xxf8xx

    xxf8xx Supreme Member

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    Like Kharis said. 64 bit only allows you to use more RAM. Now I'm not entirely sure if using more RAM would consume more energy, but if it does, it would be HIGHLY unnoticeable. Now if you start talking about difference in GPUs and running them at full throttle 24/7, you can probably expect a difference in your energy bill next month.
     
  4. LOL-Blaster

    LOL-Blaster Regular Member

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    The thing is that my laptop charger is very heavy
    so I don't want to carry it around.

    I want to limit my laptop power consumption
    so that I can use it all day without recharging.

    I heard that using 32 bit program on 64 bit windows require
    running multiple version of the same .dll file (1 for 64 bit and 1 for 32 bit)
    so it will cost more energy.

    Furthermore, the CPU has to process empty bytes when running 32 bit program.
     
    Last edited: Oct 22, 2012
  5. RWoodJr

    RWoodJr Newbie

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    64bit does more than just allow you to use more ram. It uses your resources better, has improved graphics, etc.
    As for whether or not it uses more power - No. Your OS has nothing to do with how much power you are using - that fluctuates with use depending on what you are doing. Playing games sucks more power than typing in Word.
     
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  6. cgimaster

    cgimaster Power Member

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    The energy consumption is not OS dependant!

    It depends on a lot of factors from computer usage to computer parts.

    For example, overclocking and high performance graphics card are too good example of things that can make your computer draw more energy it also depends on the usage ofc.
     
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  7. bertbaby

    bertbaby Elite Member

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    What ever difference there is will not be the determining factor as to whether or not you need to carry a charger all day. Recommend you start working out and carry that damn charger with you.
     
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  8. LOL-Blaster

    LOL-Blaster Regular Member

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    It's not just that. I can carry the charger but it takes up a lot of space.
     
  9. Amsterdammer

    Amsterdammer Power Member

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    I would look into a SSD, screen brightness and size, CPU throttling, programs running and things like that before worrying about the OS being 32 or 64 bits. :)
     
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  10. LOL-Blaster

    LOL-Blaster Regular Member

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    Already did it. My laptop maxed out @ 3.5 hours.
    It's not my first day using laptop.
    The only thing left is the OS.
     
    Last edited: Oct 22, 2012
  11. B. Friendly

    B. Friendly BANNED BANNED

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    SSD, baby. Google up a comparison for energy use between SSD's & HD's. Plus, a 10 second boot time isn't bad either.
     
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  12. Amsterdammer

    Amsterdammer Power Member

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    Didn't mean to imply that it was. :)

    For a laptop though, 3.5 hours isn't that bad I think? If you want something that lasts longer I would look at those netbooks. Due to the smaller screen, Atom processor and nifty things like that they will last up to ten hours with proper settings. No way you will get that with a laptop.
    If you actually want to work with it though, I would stick with the laptop. :p

    Other than that, I wouldn't know. Unless you want to buy an extra set of batteries?
     
  13. Paranoid Android

    Paranoid Android Jr. VIP Jr. VIP Premium Member

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    Power Consumption? Well, its defined as a TDP wattage or something. 64 bit might marginally consume more power as it addresses more memory and so on. But it isn't going to hike your power bills significantly
     
  14. s0ap

    s0ap Executive VIP Jr. VIP Premium Member

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    Memory addresses on 64bit OSes are twice as wide so code is larger. Instructions are not all 64 bits wide on modern x86-64 implementations, though all busses must be in order to accommodate larger immediates, which are truncated for the most part at 32 bits. In short this means that at an instruction level, x64 is not 2-for-1 as large as the same code running on a 32 bit OS. The register extension from AX to EAX that occurred in the 16 bit to 32 bit move back in the early 90's was extended again to RAX so that 32 bit native code could be executed without emulation.

    Larger memory requires more energy to refresh, as all cells must be refreshed every 5~10ns to prevent charge leak/contamination. Contrary to what was said above, your OS plays a huge role in mobile power consumption, especially with some of the more exotic mobile chipsets that require support at the kernel level. On a mainline 3.2 linux kernel I can get maybe two hours out of an old Sandy Bridge dual core and seven plus out of win7 x64. You can get laptop-tools and some other packages to even the numbers out but poor support will majorly tax your power consumption.

    Win7 64 vs 32 however should be a marginal difference unless you can't get chipset drivers for one or the other. Also note that none of this applies to the IA-64 architecture, but I doubt you will find any of that around.
     
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  15. cgimaster

    cgimaster Power Member

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    Well if we are talking about notebook then we have to consider a lot of other things.

    Are you connecting usb devices to it ?
    How long do you have that notebook ? Make sure its lifespan is still good, aswell as it is battery lifespan and that you have been doing good pratices on recharging it.
    Are you taking advantage of the notebook energy saver that most notebooks come with ?
    Are you letting it go on standby instead of turning it off most of the time ?
    Have you left your notebook turned on for 24h+ of plugged for too long for too many times or several days ?
    Screen brightness is one of the biggest issues to reduce the duration too.

    These are the main factors I really recall right now.

    Most notebooks will last for a long time however their battery won't and on top of that most battery can get recharge addicted and screw it even more on usability.