Replacing 320hd 7200rpm with 1tb 5900rpm, will I notice a differnece in speed?

Discussion in 'iMac' started by ixi, Nov 26, 2009.

  1. ixi macrumors newbie

    Jun 7, 2008
    Like the title says, I have a 2.4ghz 20" iMac and just bought a 1tb seagate hd rated at 5900 rpms. My hd right now is a 320gb at 7200 rpms. Will I see a big difference in speed? Should I just put the new 1tb in a case and use it as an external drive? Thanks for any info.
  2. Sun Baked macrumors G5

    Sun Baked

    May 19, 2002
    Stick the bigger drive inside...

    The 1-10 sec you might save in a day loading a file with a lot of random access fragments, might not outweigh all the time you spend moving files back and forth in order to manage the cramped internal drive.
  3. J&JPolangin macrumors 68030

    Jul 5, 2008
    Thule GL @ the TOW
    I'd partition the 1 TB drive and use it for your main iTunes access and a TM back up for the other partition... that way you don't have to worry about taking your iMac apart and dust under the screen...
  4. Warbitrary macrumors regular

    Nov 24, 2009
    Montréal, Canada
    It might run at the same speed or faster, if you don't fill it up too much. Detailed info:

    Putting a Time Machine backup on the same drive defeats the very purpose of a backup. If the drive fails, you've lost all your data.
  5. jonwd7 macrumors member

    Nov 19, 2009
    It should still run much faster.

    RPMs: 5900/7200 = 81.9% the RPMs

    Platter density: Now, if you got the 7200.12 1TB model, it fits 1TB onto only TWO platters, for 500GB/platter. I can only speculate about the # of platters in your old hard drive (depending on the age), so I'll give a few cases...

    500/320 (1-platter 320GB drive): 156.25% the density
    500/160 (2-platter 320GB drive): 312.50% the density
    …and so on…

    So at best it may still be nearly 30% faster over sustained speeds. Randoms will of course rely on access times and what not and may not be that much better.
  6. justaregularjoe macrumors 6502

    Nov 28, 2008
    I don't get it. Why can you not just pick up a 7.2k 1TB?
    They definately aren't rare, nor expensive for that matter. WD makes a 2TB Caviar Black.

  7. Outrigger macrumors 68000


    Dec 22, 2008
    FYI, there is no such thing as a 5900rpm drive, its 5700.
  8. Mars478 macrumors 6502a


    Mar 6, 2008
    NYC, NY
    No 5400RPM.
    I upgraded from a 5400RPM 160GB in my MSI Wind running 10.6.2 to a 7200RPM 320GB and the difference was amazing. It's so much faster.
    But it was 10$ more than a 500GB 5400RPM Drive. IT's a choice, speed or space.
  9. ftaok macrumors 603


    Jan 23, 2002
    East Coast

    I thought the same thing too when I saw this drive at Newegg last week. I thought it was a typo.

    Apparently, Seagate has a whole bunch of 5900 RPM drives. Here's the LINK - Barracuda LP.
  10. J&JPolangin macrumors 68030

    Jul 5, 2008
    Thule GL @ the TOW
    ...also WD is being secretive about the speeds of their "green" drives... they are between 5900 - 7200 RPM and the specs aren't easy to find info beyond that...

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