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Will I Lose SSD Speed with Upgrade

I just picked up an Early 2015 MBPr 13". Went down from an i7 mid-2014 MBPr 15" for the portability of the i5 13", but day to day I think this is actually faster. I would of gotten 2016, but I wasn't feeling the USB-C change just yet.

Anyways, the one I picked up is a 256gb and I want to up it to 512gb or 1tb of internal storage. I'm looking on eBay and It says the original Apple OEM SSD works in MBPr's from 2013 thru 2015.

My current speed from Blackmagic on the 2015 is "Write 1118 - Read 1425"--loving it!! The 2013 read and write speeds were way under that at like 700 and 300 read and write. If the read and write speeds were so much slower in 2013 (and also my 2014) How can same SSD work for all three?

Another question, and this may be a really stupid one. lol Will I lose speed if I am sent a drive that was salvaged out of a 2013 or 2014 machine? When I bought this, the Apple employee told me that with a bigger drive you actually get the faster the speeds, but this is obviously not what he was talking about. I still bought the 256gb and figured I could do it myself later if I felt I needed it. Two days later, I need it. haha

I'm obviously worried that I'll get a 2013 drive (not a 2015) and I'll lose that glorious speed.

Third question. I've read that before 2015, the flash drives were "2 lane" and the 2015 drives are "4 lane". I have no idea what that means, but If a "2 lane" 2013 drive works in my machine but is slower, how can I tell with the naked eye that an SSD is two or four lanes?

Thanks in advance for any help,

Dan

Hi,

1. Because it physically fits the 2013-2015 models. There is also a 2012 to current 13" non-Retina MBP, which is a totally different machine. I suspect you're seeing speeds from that one, which is non-comparable.

2. No. It's the same SSD, as stated in #1. These were different than the 2012 non-Retina. And yes, with bigger drives you should get somewhat faster speeds, but more importantly they have about twice the useful life.

3. You can't tell with the naked eye.

So now you've got the need for speed.

tjk, thanks for the response.

No, it was the 2013 Retina macbook pro speeds I was quoting. Here I'll post the SSD speed differences between the 2013 and 2015 below. It's still confusing to me how the same exact part # can produce such massively different speeds. Is it in the way the machine is built?

2013 Retina MBP

2015 Retina MBP

I installed a 512gb ssd from a late 2013 retina pro, it is the 2 lane, in my newer 2015 retina pro and to get 670 MBs write / 721 MBs read with Blackmagic Speed test.  This is roughly half of the write / reads from the stock 2015 256gb 4 lane PCie ssd. For day to day use I am not noticing any differences and I am just an average home user.  The only thing that concerns me is will using a 2 lane ssd in a laptop designed for 4 lane harm the laptop in any way?  Please weigh in if you have information about this.

Hello. I too installed a PCIe (2x - 512GB) pulled from a 13' MBPr and no, it will not have any effect on your MacBook. Other than the read/write speeds (1100MB/1400MB vs 730MB/730MB'ish), nothing will happen. I am in the process of getting a refund. I rather have a PCIe 4x even if its a 128GB.

最後更新：2017-08-28 10:55:42

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