Asus Zenbooks with Haswell: Zenbook Infinity and Zenbook Touch UX31A LA

asus zenbook touch haswell
By Andrei Girbea, last updated on April 2, 2021

Haswell is here and that means we’ll see a whole bunch of new ultrabooks and ultra-portables in stores in the next few months.

Asus just recently announced their new lines, and among them there are two new Zenbooks, the Asus Zenbook Infinity and the Asus Zenbook Pro UX31A.

Details are still rather scarce on the two for the time being, but stay tuned, we’ll update the post in the near future and hopefully we’ll get out hands on them asap, for reviews.

Asus Zenbook Touch UX31A LA

From the looks of it, the Zenbook UX31A LA is pretty much the UX31A we tested a while ago, with two additions: is powered by a new Intel Haswell ULV hardware platform and offers a touchscreen, instead of that nice non-glare display we had on the first UX31A generations. Having a touchscreen of course means that the entire screen is covered in glass, thus is glossy and reflective, especially when used outside. And it also adds a bit to the total weight of the product.

Aside from these, the laptop looks and feels exactly like the current generation: aluminum case (in two shades, darker on the hood, lighter on the bottom and inside), decent selection of ports around the side (2xUSB, SD Card-reader, micro HDMI and mini VGA – some dongles are also included in the pack). By the looks of it, the UX31A LA seems pretty much identical to the standard UX31A, so we can assume it’s going to measure around 338 x 226 x 11~18 mm (13.3 x 8.9 x 0.44-0.66 in) and weigh about 3.1 pounds (or 1.3 kilos).

Also, there’s probably the same 50Wh battery  inside the the UX31A LA, but while the Ivy bridge versions lasted around 5 hours each charge on average use, we could expect the new Haswell options to last about 6 to 7.

Of course, the Asus Zenbook Pro Touch UX31A LA will be available in a bunch of different hardware configurations, with Intel i5 or i7 ULV processors, different amounts of RAM and different types of storage options, including some RAID SSD  options, like we’ve seen on the Zenbook UX51.

How about prices? Well, those are still unknown for the time being, but I’d reckon the UX31A LA will start from around 1100 USD and should hit the stores during this summer. We’ll update once we know more.

Asus Zenbook Infinity

The Asus Zenbook Infinity is still mostly surrounded in mystery. Asus showcased it at Ccomputex, but offered very few details about it. We do know that it’s going to inherit many elements from the current Zenbooks, but:

  1. will be slimmer, measuring about 15.5 mm in its thickest point, as opposed to the 18 mm of the current lines;
  2. will have a Gorilla Glass covered lid, as opposed to the aluminum one on the nowadays available Zenbooks. This means that the lid cover will be a bit gripper and less prone to scratches, but will catch fingerprints like crazy. And to be frank, I don’t think that’s a fair trade-off. Remember the HP Envy 14. It was an utter nightmare!
  3. will offer a 2560 x 1440 px touchscreen, which means astonishingly sharp details, but a 13.3 inch with that dpi and Windows… sounds very bad for my eyes. I’m not complaining about the high resolution, but Microsoft’s OS is not yet there in terms of scaling.
  4. will be powered by the high end line on Intel Haswell U processors, with Iris Graphics 5100. This has a higher TDP, at 28Wh, than the regular U lines, but should be faster as well. How fast? Only time and benchmarks will tell, but in terms of graphics, Iris is expected to offer twice the performances of the Intel HD 4000 chips used on Ivy Bridge ultrabooks.

And that’s about it for now. We do know that the laptop will also feature a backlit keyboard, a LED backlit logo on the hood and will come in a darker shade than what we’re used to on the current Zenbooks, based on the units displayed at Computex.

Asus claimed they will have the Zenbooks Infinity in stores around Q4 this year, so there’s still a fair amount of time to wait before we could buy it. There are no exact details on prices, but given the specs and the features, I’d reckon at least $1500, if not more.

Asus Zenbook Infinity - slimmer, faster, with more features, but...

Asus Zenbook Infinity – slimmer, faster, with more features, but…

Anyway, that’s about it for now. I’ll update the post once there will be more details about these machines. But in the meantime, let me know what do you think? For me, the UX31A LA is an expected follow-up for a popular line, and the extra battery life, plus the performances boost, will certainly be appreciated. I only hope they will make a non-touch version as well. We’ll see.

As for the Zenbook Infinity… I don’t know. It sounds very nice on paper, such a powerful and slim computer, but we’ll have to see how the high resolution screen, powerful hardware and cramped body will be able to live with each other. I’m afraid it will get quite hot, I’m afraid the battery life could be bad and last but not least – what’s with the glass covered hood? Who wants that? :P

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Article by: Andrei Girbea
Andrei Girbea, Editor-in-Chief. I've a Bachelor's in Computer Engineering and I've been covering mobile technology since the 2000s. You'll mostly find reviews and thorough guides written by me here on the site, as well as some occasional first-impression articles.


  1. Mahapatra

    July 7, 2013 at 5:22 pm

    Well,Asus has changed the mini VGA port to mini Display port in the ux31A LA…check the video carefully.

  2. muf

    August 5, 2013 at 12:19 am

    Well, its priced in europe around 2200-2500EUR for the infinity (for pre-order)
    that’s seems very exaggerated compared to the competition unfortunately.

  3. Terry

    August 16, 2013 at 4:19 am

    When is this coming out? I need a new laptop and I think this is be the one

    • Andrei Girbea

      August 16, 2013 at 8:25 am

      I was told September

      • mX

        August 20, 2013 at 10:50 pm

        the pro, infinity or both?

  4. Fs

    September 16, 2013 at 2:18 pm

    I think it’s more likely to be October now.

    If the HD5100 can hold *reasonable* frame rates in modern games then i’d be up for it.

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