This morning Apple updated its MacBook Air to Intel's Haswell ULT silicon. The chassis itself didn't get any updates, nor did the displays. Both the 11 and 13 inch models retain their non-Retina 1366 x 768 and 1440 x 900 displays. There's a slight increase in battery capacity. The 11-inch model moves to 38Wh (8.6%) while the 13-inch model goes to 54.4Wh (8.8%). The big changes however are on the CPU, NAND and DRAM fronts.

With the new MacBook Air, Apple moves to a Core i5-4250U. The base clock drops to 1.3GHz across all of the models, but max turbo remains at 2.6GHz. Although the base clock is lower, I wouldn't expect substantially lower performance since the max turbo is unchanged as is the chassis that has to dissipate the thermals. To confirm, I ran a couple of Cinebench tests and generally found performance similar to that of last year's models:

3D Rendering Performance - Cinebench R11.5

3D Rendering Performance - Cinebench R11.5

The 1.8GHz i5 in the 13-inch ended up being a bit quicker than the 1.3GHz 4250U this generation in the multithreaded test, but in single threaded performance the two are equal. The impact on the MT test is about 5%, it's there but not substantial. Don't be fooled by base clock, it's the combination of base clock, max turbo and cooling solution that'll determine performance here. As we found in our Haswell ULT review, CPU performance isn't something you can expect to see more of with Haswell vs. Ivy Bridge in these low wattage platforms.

You can get a 1.7GHz Core i7 upgrade with a 3.3GHz max turbo (i7-4650U). Both parts have Intel GT3 graphics clocked at a max of 1GHz on the i5 and 1.1GHz on the i7. Since the max GPU clocks are south of 1.2GHz, this is officially Intel's HD 5000 graphics and not Iris despite using the same silicon. The GPU base clock drops from 350MHz down to 200MHz, which should help reduce idle power consumption.

2013 MacBook Air Lineup
  11.6-inch 11.6-inch (high-end) 13.3-inch 13.3-inch (high-end)
Dimensions H: 0.11-0.68" (0.3-1.7cm)
W: 11.8" (30cm)
D: 7.56" (19.2cm)
H: 0.11-0.68" (0.3-1.7cm)
W: 12.8" (32.5cm)
D: 8.94" (22.7cm)
Weight 2.38 lbs (1.08kg) 2.96 lbs (1.35kg)
CPU 1.3GHz dual-core Core i5 1.3GHz dual-core Core i5
GPU Intel HD 5000
Display Resolution 1366 x 768 1440 x 900
Ports Thunderbolt, 2x USB 3.0, headphone jack Thunderbolt, 2x USB 3.0, SD card slot, headphone jack
Price $999 $1199 $1099 $1299

On the storage front, Apple officially leads the charge with the move to PCIe based SSDs. The upcoming Mac Pro, as well as the new MacBook Airs both use PCIe based SSDs instead of SATA drives. A quick look at OS X's system profiler reveals a PCIe 2.0 x2 interface, capable of 1GB/s in each direction. 

The drive in my system uses a Samsung controller, although I've heard that SanDisk will have a PCIe solution for Apple as well. A quick run through Quick Bench reveals peak sequential read/write performance of nearly 800MB/s:

This is a pretty big deal, as it is probably the first step towards PCIe storage in a mainstream consumer device that we've seen. I'm still awaiting official confirmation as to whether or not this is an M.2 based solution or a proprietary connector. Update: It's a custom Apple design, not M.2. Since there's no PCIe routed off of the CPU in Haswell ULT, these 2 lanes come from the on-package PCH.

The other big change is the move from DDR3L to LPDDR3, a new feature supported by Haswell ULT. I need to go back and dig through the Haswell ULT datasheets again, but I believe the total memory interface width remains at 128-bits wide even if you use LPDDR3 - you just get lower power consumption. 

Obviously battery life is the biggest improvement here with the new MacBook Air. Thanks to Haswell's platform power optimizations, Apple claims up to 12 hours on a single charge for the 2013 13-inch MacBook Air. Given the improvements I saw in our Haswell ULT review, I don't doubt that we could see some very good numbers out of these notebooks.

I just got my hands on a 13-inch 2013 MBA and I'll be running performance tests (including the first look at Intel's HD 5000 graphics) over the coming days. I'm still traveling until Thursday but I'll do my best to run battery life tests while I'm on the road as well. More soon!

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  • Mr Perfect - Tuesday, June 11, 2013 - link

    No kidding... Every time AT throws a SSD in a Mac for testing, they always comment on how OSX doesn't TRIM them. I wonder why they don't just edit these plist files?
  • mestarm - Thursday, June 13, 2013 - link

    The plist hack is not reliable, my Intel SSD got crazy with it... Since this hack is not official - this is why AT is correct in stating that SSD trim is not supported (for non built-in ssd)
  • iwod - Wednesday, June 12, 2013 - link

    You are the only one who mention this in comment. I was late to this discussion and i was hoping more would have discover this already.

    This,'t isn't PCIe SSD. it is SATA Express. So to those who keep saying it is PCIe Raw without the SATA Overhead it is not true. I hope Anand will dig more into this
  • mavere - Wednesday, June 12, 2013 - link

    Intel's chipsets don't natively support SATA Express yet, and Apple isn't known to arbitrarily add extra controllers (or extra anything) into their mobile systems.

    Also Apple stated the Mac Pro uses PCIe SSDs, and there's a production benefit for Apple to standardize connectors.
  • repoman27 - Wednesday, June 12, 2013 - link

    To quote a SATA-IO slide on the subject:
    "SATA Express is PCIe
    The SATA Express environment is pure PCIe
    There is no SATA link or transport layer, so there’s no translation overhead
    Users will see the full performance of PCIe"

    SATA Express appears to be just an electrical/mechanical specification which combines existing protocols into a couple common physical interfaces. Sort of like ExpressCard—you didn't need chipset support to implement it, just PCIe, USB and OS support.

    Apple seems to have deftly avoided the prescribed physical interfaces and once again gone proprietary in that regard. This is not M.2 (formerly known as NGFF).
  • StealthGhost - Wednesday, June 12, 2013 - link

    Battery capacity went up to 38 and 58 watt hour respectively.

    Not sure if this has been pointed out yet but it's still wrong.
  • hasseb64 - Wednesday, June 12, 2013 - link

    Apple has increased battery capacity in Air.
    Haswell is still not that big improvement as your articles claim.
  • Neurus - Wednesday, June 12, 2013 - link

    So… according to your math, (taking the 11inch model as an example). Going from a 35-watt-hour battery which could give "5 hours of web" to a 38-watt-hour battery and getting "9 hours of web" is not " a big improvement…

    35 -> 5 hours.
    38 -> 9 hours.

    Not an improvement at all! My God! Let's go buy a Lenovo.
  • Neurus - Wednesday, June 12, 2013 - link

    The 13'' model is WORSE! OMG!

    It went from a 50 watt battery where it could only get 7 hours… to a new 54 watt battery and now it only gets 12 hours… damn you Apple!


    Something is wrong at Apple.
  • ashic - Wednesday, June 12, 2013 - link

    "On the storage front, Apple officially leads the charge with the move to PCIe based SSDs." - Don't really expect accurate journalism from crApple fanboy Anand any more. The Vaio Pro has already done PCIe SSDs on an ultrabook. Get your facts straight.

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