PCIe SSD Performance

I created a Boot Camp partition of around 120GB and ran our client iometer benchmarks to put the new PCIe SSD’s performance in perspective.

Peak random read performance is roughly comparable to the previous-generation Samsung controller. Random write performance took a bit of a hit but it's still more than fast enough for client workloads. Sequential speeds are much improved but the gains are really only visible at high queue depths. Low queue depth sequential transfers can’t be split up enough in order to really require PCIe.

Apple SSD Comparison - 4KB Random Read (QD3)

Apple SSD Comparison - 4KB Random Write (8GB LBA Space - QD3)

Apple SSD Comparison - 128KB Sequential Read (QD1)

Apple SSD Comparison - 128KB Sequential Write (QD1)

What does this mean in the real world? The new SSD is definitely snappier in system use. Wake from sleep is a bit quicker, as are application launches. The funny thing is that with the exception of high-speed Thunderbolt arrays, most external sources aren’t fast enough to even stress the new storage subsystem in the MacBook Air. Large file copies confined to the drive itself benefit a bit as well. I saw roughly 300MB/s reads and 300MB/s writes when copying a large dmg from/to the MacBook Air’s PCIe SSD (compared to roughly 200/200MBps on the old Samsung SATA SSD from the rMBP15).

If you have an external Thunderbolt array with at least a couple of drives, you should have no issues matching the MBA’s internal SSD performance.

Seeing as how this is our first experience with Samsung’s PCIe SSD controller, I wanted to get a feel for how the drive behaved under extended high queue depth random writes. I ran a modified version of our IO consistency test. The test was modified to run in a 91GB space on the MBA’s Boot Camp partition. I made sure to fill the rest of the drive completely, but the random writes were effectively constrained to 91GB of LBAs. When I get back from the UK I’m going to try setting up an external boot drive and will do some more extensive testing on the drive.

The IO consistency results, at least within a somewhat constrained space actually look really good. I have a feeling that Samsung might have improved its IO consistency story with this generation, but I’ll wait on saying for sure until I’ve had a chance to do some more work with the controller. For the vast majority of users however, solid random write performance like this over a 91GB space on a full drive is actually very good news.

A Custom Form Factor PCIe SSD 802.11ac: 533Mbps Over WiFi
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  • Skolde - Monday, June 24, 2013 - link

    I find the current display resolutions on these "premium" products to be very lacking for me to actually seriously consider a purchase. At least stick something in there like 1600x900.

    ....1366 x 768? Come on!

    Also - bumping the memory up to 8GB would be nice. I know it isn't build to be a workhorse, but still.

    The XPS13 from Dell seems to be a much nicer option currently.
    Reply
  • rangerdavid - Monday, June 24, 2013 - link

    1440 x 900 on this 13". Reply
  • ddriver - Monday, June 24, 2013 - link

    Why not, they put higher resolution on 5 inch phones... Reply
  • darwinosx - Monday, June 24, 2013 - link

    They put higher resolution screens on their retina laptops. The Air focus on battery life and performance above all. Reply
  • designerfx - Monday, June 24, 2013 - link

    except that's a problem. You can't take advantage of certain basic parts of *performance* if you have a terrible display. Reply
  • dsumanik - Tuesday, June 25, 2013 - link

    Here is the non TLDR version of this review:

    "intel came out with a new CPU, samsung made a new SSD and apple slapped it together last minute in an existing design. Ultimately, You get a slower, longer lasting air for a 100 bucks less that carries over all the little annoyances from last year."

    whoop dee f*ckin do……..This is apple innovation?

    "the m.2 spec wasnt far enough along to be used in this generation"

    Oh please, What a load of horse ****. I think anand, like many other review sites invested heavily in apple stock and are now trying to stop the bleeding. Apple has been deliberately stifling user upgrades for years….That is why they have proprietary connectors…ON EVERYTHING...your readers, and your reviewer knows this.

    "The only thing that hasn't changed, that perhaps should have is the display. "

    ya think? My phone has better rez. You've been criticizing PC makers for 2 years about the 1366x768 resolution, and here we have apple in 2013 and you say they "perhaps should have changed"

    ROFL

    Here are some "cheap" things they could have done to actually make this product an upgrade:

    -move the thunderbolt port beside the power connector (no more stethoscope when plugged in driving a display)
    -second thunderbolt port (now you can have 2 displays native and not be down a precious USB3)
    -16gb ram availability (now I can run several VM's comfortably when developing)
    -performance on par with last years MBA?
    -nfc support
    -4G support

    here is some mild innovation they could have done:

    -detachable screen (tablet notebook hybrid)
    -retina display
    -wireless desktop charger

    3rd tier PC makers are coming out with better hardware than apple now, this year was critical and they've dropped the ball…with the exception of the Mac pro.

    a smartwatch *could* be cool if it comes out totally water proof for active users…jogging swimming etc, if not i don't see the incentive to purchase unless it is super low cost.

    what they need to "fix" the situation

    -low cost iPhone (incoming 2013)
    -large screen iPhone (2014)
    -retina display across the board on all products (2015)
    -updated thunderbolt display, USB3 and 4k Rez for under 2000 bucks.
    -apple branded TV and home theatre system
    -thunderbolt or USB3 sync speeds on all iDevices

    Dump your apple stock now, it will bounce back but never to the highs it was previously.
    Reply
  • Glindon - Wednesday, June 26, 2013 - link

    Bored much? Reply
  • abazigal - Wednesday, June 26, 2013 - link

    Can you name me all the other manufacturers who are implementing these features, much less doing them properly?

    You want retina, there's the 13" retina MBP. And I think he was criticising manufacturers for using 1366x768 res on a 13" laptop screen. Apple uses that for their 11" MBA line, which I find is still acceptable.

    Apple decided that a slight decrease in performance was an acceptable tradeoff for longer battery life. And I am inclined to agree with them. The new processor speed still more than suffices for what typical consumers use it for anyways.

    What am I supposed to do with NFC on a laptop? You want the power source to be beside the thunderbolt port. I don't think there is quite sufficient space for 2 USB ports on one side, and so long as it hooks up to your thunderbolt display just fine, does it really irritate you so that the two cables split up?

    Personally, I feel there is nothing Apple "needs" to do. I am perfectly fine with their products. I like them, I buy them.
    Reply
  • ysaykin - Saturday, July 13, 2013 - link

    I think that in a way the comments are right. 11 inch laptops for $1000 should have some luxury features. One of those is amazing battery life, good keyboard, nice display, and good performance. The macbook air has some bases covered, but lacks the display. The resolution is fine for a sub $600 notebook but not at $1000, also a TN panel on a $1000 notebook sounds like a rip off. It should have been at least an ips panel. The longer battery life is only achievable because Mac OSx has been optimized for battery life, but if you use windows on the machine your battery takes a huge dip. So is it a good laptop, definitely, but is it worth the $1000 price? I think it's def a mac tax. Look at the Lenovo yoga which if updated to haswell would have awesome battery life, touchscreen, ips 1600x900 resolution, and convertible to tablet mode. Reply
  • vol7ron - Wednesday, June 26, 2013 - link

    I'm sorry, have you ever owned an MBA? You don't want to be doing any heavy development on this device, it will get hot fast.

    This device should be the Traveler's Laptop: good enough to carry with you, more productive than an iPad, full keyboard, longer battery life than a regular laptop, lighter weight, and a few ports to maybe support what you need. It would be perfect for a plane or train, maybe to lounge by the pool, but should not be considered as a desktop or MBP replacement.

    The shame of it is that it's so portable, that it leaves you wanting to do more with it. It almost has done it's job too well. In that regard, you are right, it is lacking the things that would put it over the edge, that would make it a replacement of the desktop/MBP, which again it's not. But be conscious that [I think] this has no fans, and from when I used it, got hot really fast -- horrible for any extreme development, or even long-term gaming.
    Reply

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