How does mid-2015 rMBP 15-inch gain an extra hour of battery life?

Discussion in 'MacBook Pro' started by CheesePuff, Jun 22, 2015.

  1. CheesePuff macrumors 6502

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    #1
    With the same CPU, GPU (at least integrated), system bus, RAM, etc. how did Apple achieve then an extra hour of battery life on the mid-2015 model? Is it because of the "time saved" doing anything disk intensive due to the faster PCIe drive?
     
  2. shoehornhands macrumors regular

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    Oct 9, 2014
    #2
    The new SSD is probably where it's coming from. I think Apple is using the Samsung XP951 in the new MBP (I'm not 100% certain though) and I know they have a drastically reduced idle power consumption over the XP941 in the 2014 MBP (2mW vs 50mW). I'm not sure what the difference is in load power consumption though.

    Aside from the SSD, there might be a bit of marketing involved (e.g. I can get 10+ hours out of my 2014 MBP if I turn the display brightness down, turn off Bluetooth and don't do anything strenuous). Point being, they probably could have marketed the 2014 MBP as 9 hours and gotten away with it as well.
     
  3. cookies! macrumors 6502

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  4. CheesePuff thread starter macrumors 6502

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    #4
    Proof on that?
     
  5. dagamer34 macrumors 65816

    dagamer34

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    #5
    5% difference compared to 2014 model.
     
  6. leman macrumors 604

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    Oct 14, 2008
    #6
    Uhm, look at the specs ;)
     
  7. yjchua95 macrumors 604

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    #8
    It's the SM951, but without NVMe.
     
  8. CheesePuff thread starter macrumors 6502

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    #9
    Sorry guys had no idea the battery was larger and the weight was increased.. missed that when comparing specs. Now it makes perfect sense!
     
  9. Mac.User macrumors 6502

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    Aug 25, 2013
    #10
    yeah its probably a sum of things.
    CPU that can do more things in less time leading to less power usage.
    GPU that can do more things in less time leading to less power usage.
    Slight battery bump
    More efficient software/drivers drivers then when the original rating was done.
    faster RAM that can do more things in less time leading to less power usage.
     
  10. CheesePuff thread starter macrumors 6502

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    Southwest Florida, USA
    #11
    But the CPU, GPU (for base model 15) and RAM are identical from the previous model.

    The larger battery and faster PCIe drive are the only two reasons.
     
  11. Mac.User macrumors 6502

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    Aug 25, 2013
    #12
    AH I thought they got small speed bumps but were same architecture.
     
  12. jamin00 macrumors 6502

    jamin00

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    Location:
    Essex, UK.
    #13
    Pleasantly surprised by this
     

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