1TB vs 512GB SSD Speed

Discussion in 'MacBook Pro' started by segalas, Oct 28, 2013.

  1. segalas macrumors member

    segalas

    Joined:
    Mar 2, 2007
    #1
    I'm about to pull the trigger on a 15in rmbp...

    I'm torn between the 512GB and 1TB option.

    Could any 1TB users post a screenshot of their read/write speeds? I believe I've seen the 512GB hovering around ~720MB read/write.
     
  2. Quu macrumors 68020

    Quu

    Joined:
    Apr 2, 2007
  3. cmmaia macrumors newbie

    Joined:
    Aug 16, 2010
    #3
    I believe the 1TB SSD is slightly faster at around over 800MB/s for both read/write. Hopefully someone will post a SS here.

    EDIT: That's it..
     
  4. ScubaCinci macrumors 65816

    ScubaCinci

    Joined:
    Jul 11, 2008
    Location:
    Cincinnati OH
    #4
    They should be roughly the same...only the 256GB might be slower. I think Anandtech actually did a comparison on these.
     
  5. PDFierro macrumors 68040

    Joined:
    Sep 8, 2009
    #5
  6. walkie macrumors 6502

    Joined:
    Feb 13, 2010
    #6
    Wow X2 !!!
     
  7. Quu macrumors 68020

    Quu

    Joined:
    Apr 2, 2007
    #7
    It feels incredibly fast to be honest. Boots up so fast I think the Macintosh chime is actually slowing the boot speed and I am _not_ kidding.
     
  8. segalas thread starter macrumors member

    segalas

    Joined:
    Mar 2, 2007
    #8
    Wow, Quu--Thanks! Those speeds are absurd! :eek:

    Done deal, thanks again. I will order mine when funds arrive Wednesday. :D
     
  9. PDFierro macrumors 68040

    Joined:
    Sep 8, 2009
    #9
    I do remember reading a few posts before Quu's talking about the superior speed of the 1TB, but now I really believe it. That's crazy.
     
  10. Quu macrumors 68020

    Quu

    Joined:
    Apr 2, 2007
    #10
    If you guys want any other tests done with the SSD like other apps or what-not let me know :)
     
  11. simon48 macrumors 65816

    simon48

    Joined:
    Sep 1, 2010
    #11
    Would you be willing to time the startup? I love to know how long for a full startup is (power button through to Google homepage in Safari set to open on startup).
     
  12. SpitUK macrumors 6502

    Joined:
    Mar 5, 2010
    #12
    Thats amazing!!

    How do you run Blackmagic as a benchmark? It just seems to go on forever lol.
     
  13. Quu macrumors 68020

    Quu

    Joined:
    Apr 2, 2007
    #13
    I can't do it right now because I'm still migrating my data. But earlier I unscientifically did a test. I'd estimate it took about 5 or 6 seconds from the power button to the desktop.

    To put this in perspective, my 2009 17" MBP also has an SSD (SATAII gets about 180MB/s read and 100MB/s write on disk bench).

    I hit both power buttons at the same time and the new Retina MBP was at the desktop before the startup chime on my old 17" MBP even began. And that machine isn't no slouch it boots very quickly with that SSD.

    ----------

    Just run it until its done a few loops then stop it :)
     
  14. simon48 macrumors 65816

    simon48

    Joined:
    Sep 1, 2010
    #14
    WOW! That is insane! I just tested my mid-2010 MBP's (no SSD, I been waiting for a rMBP) startup, 1 and a half minutes.
     
  15. Previse macrumors member

    Joined:
    Jan 20, 2012
    #15
    I have the 512 model and it's essentially the same .. The big difference is really for larger files, mac os boots essentially the same speed between the 1tb + the 512 since most files wont be able to even reach the 700MB/s read
     
  16. Quu macrumors 68020

    Quu

    Joined:
    Apr 2, 2007
    #16
    The IOP speed also increases, not just the sequential file transfer speed. Smaller files will greatly benefit from that.
     
  17. Guy Mancuso macrumors 6502a

    Joined:
    Mar 28, 2009
    #17
    Quu your killing me here. I'm sending you the 500 dollar increase to pay. Lol

    Just kidding. I need to figure out what I can get in my signature below before I can commit. I need to hide this purchase . ROTFLMAO
     
  18. mankymanning macrumors regular

    Joined:
    Jul 18, 2008
    #18
    I have the same drive arriving soon :) How on earth is writing faster than reading?!
     
  19. Quu macrumors 68020

    Quu

    Joined:
    Apr 2, 2007
    #19
    The SSD stick has RAM on board. We know that the 256GB and 512GB SSD's have 512MB of RAM on board. We don't yet know what amount of RAM the 1TB has. It could have 512MB like the others or it could have 1GB.

    But the point is this RAM is used as a cache so incoming data to the SSD will hit the RAM first (which will be faster than the NAND sitting behind it) which is likely why the write speeds are higher than read speeds. But ya know, this is just an educated guess, I have a RAID array in my server and my RAID card has dedicated RAM on it for write caching also and writes there are much faster than reads as a result.
     

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