SSD Performance

Last year's MacBook Air was the first Mac to ship without a mechanical hard drive or an option to install one. Using a custom form factor, Apple partnered with Toshiba (and later Samsung) to build value SSDs for the MacBook Air line.

Although Apple has tested solutions from Intel, Marvell and SandForce, to date it hasn't opted to ship any of them to market. Toshiba and Samsung offer much better pricing and don't mind being silent members of the supply chain. There are also reliability benefits. While Toshiba and Samsung may not perform as well as the aforementioned controller makers, they've definitely had fewer issues.

My 13 had a Toshiba based drive while my 11 had a Samsung drive. You can tell what controller you have by looking at the model string in a System Report from your machine. The SM prefix indicates a Samsung drive while the TS indicates Toshiba:

Both controllers are limited to 3Gbps operation (neither company has released a 6Gbps controller) but performance does vary pretty significantly between the two:

2011 MacBook Air SSD Performance Comparison
  4KB Random Read (QD3) 4KB Write Read (8GB LBA Space QD3)  128KB Sequential Write 128KB Sequential Read
13-inch MacBook Air (Mid 2011) - Toshiba SSD 18 MB/s 1.65 MB/s 204.2 MB/s 189.5 MB/s
11-inch MacBook Air (Mid 2011) - Samsung SSD 44.6 MB/s 27.2 MB/s 258.0 MB/s 234.4 MB/s
11-inch MacBook Air (Late 2010) - Toshiba SSD 31.1 MB/s 2.49 MB/s 147.0 MB/s 113.0 MB/s

The Samsung drive has much better random and sequential performance, maxing out the 3Gbps interface when it comes to sequential reads.

In regular use I doubt you'd notice a huge performance difference between the two, but if you want the fastest drive you want the Samsung. Compared to last year's MacBook Air (Toshiba) you get a huge boost in sequential read/write performance.

Both drives support TRIM under OS X.

WiFi

Unlike other members of the 2011 Mac family, the MacBook Air retains a WLAN stack with 2 receive and 2 transmit antennas via the Broadcom BCM4322. The WLAN solution in the Air is capable of up to two simultaneous spatial streams, topping out at 270Mbps.

In practice this results in peak performance over 802.11n at around 128.8Mbps. Testing at the same distance I tested the MacBook Pro and iMac at, the results drop to 116.8Mbps.

802.11n Network Performance Comparison
  27-inch iMac (Mid 2011) 15-inch MacBook Pro (Early 2011) 13-inch MacBook Air (Mid 2011) 11-inch MacBook Air (Mid 2011)
Peak Network Transfer Speed 150Mbps 133Mbps 116.8Mbps 116.8Mbps

The new Air also supports Bluetooth Low Energy, although without any Bluetooth LE devices on hand I was unable to test the feature.

The Display: Better than Most, Not as Good as the Pro CPU Performance: A Huge Upgrade
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  • darwinosx - Saturday, July 30, 2011 - link

    There is barely any difference between Elitebook models to talk about. Nor is there anything particularly special about them. Just another Windows clone made and supported a little better than what HP sells at Best Buy. Given that, it was covered quite well. Reply
  • OCedHrt - Thursday, July 28, 2011 - link

    This is so last year. This is not even what I got in my Sony Z last year. For $1600. 2.4 ghz i5 (520m), GT 330M in 3 lb chasis with internal dvdrw. And that was bottom of the line. Not to mention I got mine from MSFT with 40% off.

    This year: http://store.sony.com/webapp/wcs/stores/servlet/Ca...

    Of course this one costs way more, but still worth a though.
    Reply
  • beginner99 - Thursday, July 28, 2011 - link

    lol yeah. Sony is the only brand that has even more ridiculous pricing than Apple. You say it yourself 40% off. And in this case I say apple's pricing is very competitive and I'm an "apple-hater". Never owned a single device from them, not even an Ipod.
    The new base model Vaio Z will also be about 40% more expensive at half of the SSD capacity.
    Anyway, I would have already bought it, if it was a windows system.
    Reply
  • Johnmcl7 - Thursday, July 28, 2011 - link

    I wouldn't say Sony's pricing is ridiculous as you're paying for absolutely cutting edge tech whereas with Apple . The previous Z series may have been pricey but it featured a 13.1 1080p screen (genuine 1920x1080), up to an i7 dual core processor, quad SSDs in RAID 0, dual graphics graphics cards (one integrated, one discrete), blu-ray writer which even Apple's 17in machines couldn't match but was smaller and lighter than Apple's 13in machines.

    I have the Vaio from the previous generation (Z5) which has a C2D 3Ghz processor, 13.1 1600x900 screen, dual 128GB mSSDs in RAID 0, blu-ray writer and integrated & discrete graphics cards which again Apple didn't offer anything even remotely comparable. Speccing up a Macbook to the maximum level put it far above the Vaio in cost but far below in spec with just a 2.6Ghz processor, DVD burner, single graphics card and low resolution screen.

    John
    Reply
  • darwinosx - Saturday, July 30, 2011 - link

    Kids, read the review and learn something before commenting. No Sony has this proc in it yet. Also learn something about cpu speed in different processor models. Finally try to understand that this laptop is meant to be super thin and lightweight which the Sony is not. It is also top quality construction support and uses a modern OS. Reply
  • OCedHrt - Tuesday, August 02, 2011 - link

    The sony from last year is nearly the same weight at 3.1 lb with an internal optical drive and the new one this year is much lighter at 2.5 lbs with external.

    The Sony Z specifically do not use ULV processors for maximum performance:

    Intel® Core™ i5-2410M processor (2.30GHz) with Turbo Boost up to 2.90GHz
    Intel® Core™ i5-2540M processor (2.60GHz) with Turbo Boost up to 3.30GHz
    Intel® Core™ i7-2620M processor (2.70GHz) with Turbo Boost up to 3.40GHz

    The base processor already matches the top of the line Air processor in turbo and far exceeds it in other conditions.

    So to recap: Sony Z from last year (Z11-Z14) is already super thin and light weight at significantly faster performance for same cost, and sometimes cheaper when Microsoft Store has a crazy sale.

    Sony Z for this year Z21 is even thinner and lighter at even faster performance for a slight premium. Remember the lowest Z performs better than the fastest Air. $1969 vs $1599 gives you an external dvdrw and discrete graphics and usb 3.0. That's not a bad deal at all.

    Keep in mind the fastest Z will kill the Air in performance all in the same chasis. And battery life from reviews indicate the new Z is on-pair with Air (4+ hours with a movie playing continouously).
    Reply
  • OCedHrt - Tuesday, August 02, 2011 - link

    $1600 was not 40% off. I got mine for $1100. $1600 is the retail price at B&M for the entry level model that I outlined (with 64gb x2 SSD). Reply
  • ViRGE - Thursday, July 28, 2011 - link

    Looking at the specs, something doesn't make sense. They're using 35W TDP processors and claiming better battery life on a smaller battery than the 13" MBA. The math doesn't add up on that one. Reply
  • KPOM - Thursday, July 28, 2011 - link

    Might Sony be including the optional "sheet battery" in that time? Reply
  • ViRGE - Thursday, July 28, 2011 - link

    Nope. They break that out separately. Reply

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