Read and write SSD speed on new RMBP

Discussion in 'MacBook Pro' started by clipsedsm95, Oct 30, 2013.

  1. clipsedsm95 macrumors member

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    #1
    Hey guys so I ordered the top of the line RMBP 15 with GT750M wednesday. I got it saturday it's been a beauty but i've been noticing some users almost reaching 1000MB+ on write speeds for the new SSD but when I go to test mine I barely get 750 MB write and read is there possibly something wrong with my machine?
     
  2. PDFierro macrumors 68040

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    Sep 8, 2009
    #2
    Keep in mind those speeds are generally for a 1TB SSD. Do you have 512GB? But no, there is nothing wrong with it. 750 is still extremely fast.
     
  3. clipsedsm95 thread starter macrumors member

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    #3
    Yes I must refrain from naming it top of the line, it is the 512GB SSD Model
     
  4. rgarjr macrumors 603

    rgarjr

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  5. PDFierro macrumors 68040

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    #5
    Then that'd be why. It is top-of-the-line base model, but not maxed out.
     
  6. Yahooligan macrumors 6502a

    Yahooligan

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    #6
  7. NewYorkRanger macrumors regular

    NewYorkRanger

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    #7
    Quu posted this in another thread:

    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.
     
  8. soamz macrumors 6502a

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  9. rgarjr macrumors 603

    rgarjr

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  10. KPOM macrumors G5

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    #10
    That's generally the case with SSDs. All else equal, higher capacity drives outperform lower capacity drives. I think it has something to do with the density of the NAND memory. A drive with twice the capacity has twice the density.
     
  11. Guy Mancuso macrumors 6502a

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    #11
    Your speeds are normal with the 512 gb and 16gb

    The 1tb a member has is getting close to 1000 reads/ writes.

    These are really great speeds. I have a Samsung 840 Pro 512gb SSD drive in my box which is one of the fastest drives around and I'm just under 500.

    Apple really did well on updating these internal drives.
     
  12. simon48 macrumors 65816

    simon48

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    #12
    This could be true, one other way is there are more chips working in tandem.
     
  13. Yahooligan macrumors 6502a

    Yahooligan

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    #13
    SATA3 SSDs will never be able to match PCIe-based storage, the interface caps out at ~600MB/s. The mid-2012 and early-2013 rMBPs use SATA3, the new rMBPs have adopted the PCIe SSD setup of the Air which is what allows for the much higher throughput.
     
  14. Guy Mancuso macrumors 6502a

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    #14
    Exactly and this is one of the major reasons I want in now. These speeds are awesome. Been fighting this for a long time. Spent a fortune on SSD drives. I'm going for the 1tb unit. Its going to kill me money wise but I need and want these speeds.
     
  15. Yahooligan macrumors 6502a

    Yahooligan

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    #15
    A bit off-topic, but I'm actually planning on replacing my cMBP with a new Mac Pro. I have no issue with my current SSD speed, it kicks butt. I just want the better GPUs and CPUs along with something that doesn't sound like a jet whenever I'm working in FCPX. :) I don't know that I'd even notice the difference between SATA3 and PCIe SSDs with what I do.

    But then again, if the new Mac Pro is able to process that much faster then I'm sure the PCIe storage will be beneficial.
     
  16. Guy Mancuso macrumors 6502a

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    #16
    My issue is I need to be on the road, so I'm tied to the MBP. So a MacPro is just not going to help me. For me its about raw image processing speed. I use a program heavy dependent on core and processor. So I need to max that out . The drive speeds would help read the raw and write the final tiff files in the quickest manor. Need the ram for Photoshop which is ram heavy. Photographers and video folks on a Pro level face these issues. Yea the MacPro is really the answer for us.

    Looks like we both have basically the same MBP today.
     
  17. ano0oj macrumors 6502

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    #17
    isn't that what apple has posted anyways? around 700mb/s
     
  18. Guy Mancuso macrumors 6502a

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    #18
    Not sure I just saw some other members scores on the 512.
     
  19. Macshroomer, Oct 31, 2013
    Last edited: Oct 31, 2013

    Macshroomer macrumors 65816

    Macshroomer

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    #19
    Souping raw files is my main time eater too, but I think a faster SSD will be third to ram and CPU horsepower. I have used my 512GB i7 16GB for a day now and while I love it, the fact I could double my onboard storage and increase write / read speeds by 30%....?....that is something that needs to be known before ordering one of these new laptops, that is actually a huge number for a spare $500!

    I think the big difference in speeds has been somewhat hidden in this offering, this site does too for that matter:

    http://www.thessdreview.com/daily-news/latest-buzz/hard-lesson-learned-new-release-apple-products-containing-lesser-performing-sandisk-128gb-ssds/

    Regardless, OWC seems to be working hard at offering 3rd party solutions some time next year but in what time frame and at what price? Likely not cheaper than going the Apple BTO route and it is hard to say how close they could get to the theoretical max of PCIe's 1,250 MB/s any time soon.

    So I just initiated a return for my 512 and ordered the 1TB using an edu discount, I forgot that since I teach workshops a couple times a year that I could do it so all told it will cost me about $300 to do the swap and be done with it. Now I can keep my 100GB Dropbox account folder synced like I do on my MacPro among other things, should have just gone 1TB in the first place, lol!
     
  20. Quu macrumors 68020

    Quu

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    #20
    256GB = 700-750MB/s
    512GB = 700-750MB/s
    1TB = 900-1GB/s

    That's pretty much how it goes this generation. My rMBP with 1TB SSD gets about 880MB/s reads and 1008MB/s writes. Proof: http://i.imgur.com/zKBGjG9l.jpg
     
  21. lg251, Oct 31, 2013
    Last edited: Oct 31, 2013

    lg251 macrumors 6502

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    #21
    Pretty much what I got hehe!

    13inch with 512GB SSD did : 721 read and 716 write!! (Blackmagic)
     
  22. raybies, Oct 31, 2013
    Last edited: Oct 31, 2013

    raybies macrumors member

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    #22
    Most of my colleagues (2) laptops have raid 0 ssd's... they're getting over 1gb/s.

    My MBPr PCIe 512GB ssd... 690-730mb/s write.
     
  23. Quu macrumors 68020

    Quu

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    #23
    You mean over 1GB/s not 1TB/s.
     
  24. raybies macrumors member

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    #24
    Fixed :D
     
  25. Guy Mancuso macrumors 6502a

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    #25
    Agree I think the processor is the main speed bump we need than ram followed by the reads and writes. Like to see if that is true as saving the 500 1tb would be nice. Having the extra 500gbs of data would be nice but I off load everything after processing anyway so not mandatory. I teach workshops also so the education discount is a option as well.
     

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