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You are here: MacNN Forums > Hardware - Troubleshooting and Discussion > Mac Notebooks > 7200 RPM HD and battery life

7200 RPM HD and battery life
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Skypat
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Jun 28, 2007, 05:24 AM
 
Hi. I was wondering.
Does a fast 7200 RPM hard disk limit the battery life a the new MBP ? Compared to a 5400 RPM drive i.e.

Thanks
S k y p a t
     
chris v
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Jun 28, 2007, 07:49 AM
 
Not sure about the MBP, but I swapped out the 4200 rpm drive for a 7200 rpm one in my Powerbook 1.25, and haven't really noticed a difference in battery life. I haven't measured it exactly, but it's not significant, if there is one.

When a true genius appears in the world you may know him by this sign, that the dunces are all in confederacy against him. -- Jonathan Swift.
     
Nivag
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Jun 28, 2007, 08:00 AM
 
If you believe the hype, the new 7200rpm HDs are meant to be similar in power usage to the 5400rpm.
     
ghporter
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Jun 28, 2007, 08:37 AM
 
The "hype" is usually on track. While startup current usage may be somewhat higher, normal operation of a faster hard drive should not perceptibly impact battery life. That's how the drives are designed.

Glenn -----OTR/L, MOT, Tx
     
chabig
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Jun 28, 2007, 11:07 AM
 
Hype doesn't even factor in. You can check power consumption specs at the manufacturers' websites. It's about the same.
     
Skypat  (op)
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Jun 28, 2007, 05:06 PM
 
Thanks for the answers
S k y p a t
     
kazurm
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Jun 28, 2007, 05:38 PM
 
From Barefeats:

"
We must warn you that the newest, fastest drives use more battery power. We'll report on those specifics in a subsequent article -- but suffice to say, "You can't have it both ways."
"
15" AL PB, 1.25GHz, 512MB (my first Apple)
     
mduell
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Jun 28, 2007, 06:24 PM
 
The power consumption specs are available from Seagate/Hitachi... generally less than a quarter watt (~1% of total laptop power consumption) difference.
     
   
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