Final Words

When looking at convertible laptops, Lenovo likely has the most prolific number of convertible devices and they fall under the Yoga line. When they came up with the Yoga hinge, it set the bar for convertible devices. It keeps the balance and usability of a traditional clamshell Ultrabook, but adds in the ability to use it in three additional touch modes. For the Yoga 3 Pro, Lenovo has refined this experience again, with a thinner, and lighter laptop. The watchband hinge is both stylish and functional. They have kept the high resolution display of the Yoga 2 Pro, but improved the overall efficiency of the device which allowed them to keep similar battery life with a smaller, and therefore lighter battery.

Moving to Core M may seem like a step backwards in performance. However when you compare most workloads to the outgoing Core i5 Yoga 2 Pro, the Yoga 3 Pro can hold its own against it, and even surpasses it in many benchmarks. Core M is more than just a lower power SoC. It is also about packaging. The size of Core M as compared to Broadwell-U is quite a bit smaller in all dimensions, including the Z axis, which allows for more space for other components around it, and a thinner overall device. When you look at the Yoga, and realise it is not just a notebook computer, the extra reduction in thickness is appreciated. It is still a bit big to use as a tablet, but it is better as a tablet than the outgoing model.

From left to right: Broadwell-Y (Core M), Broadwell ULT/ULX and Haswell ULT/ULX

The GPU side is certainly a regression though. Core M’s very restrictive TDP of just 4.5 watts means that the GPU is limited a lot quicker than Haswell-U or Broadwell-U GPUs are. It has the same basic architecture as the Broadwell-U GPU, and therefore it should have similar performance if given the headroom for this. Intel still has some work to do on the GPU side to make it more efficient, and they lag some of their competitors there, although less so with HD 5300 than the woeful Atom N2840’s Intel HD Graphics. They have made some headway here, but still have some more room to improve.

As a tablet, the Core M powered Yoga 3 Pro will run circles around other tablets when performing CPU tasks. The GPU is a bit behind, but it is ahead of the iPad Air already, so it is not a slouch. The CPU is miles ahead though, even when compared to the Apple A8X which is consistently the best ARM based tablet CPU.

The display, which was a defining feature of the Yoga 2 Pro, is a slightly different model of the Samsung RGBW IPS LCD. It offers the same great viewing angles and crisp text as before, but it also suffers from being uncalibrated. It would be nice to see Lenovo include an ICC profile, or better yet to switch to the Sharp IGZO display which has proven to be the current LCD to beat right now. The one real drawback of the Samsung display is the terrible black levels, which give a mediocre contrast ratio and is very noticeable when watching movies on the Yoga 3 Pro. A switch to a true RGB model like the Sharp would fix that glaring issue. The steady march of progress means that Lenovo sitting still on their display means that they have been passed by their competitors.

Lenovo has fixed their biggest issue with the Yoga 2 Pro though, and that was the wireless performance. The move to a Broadcom 802.11ac solution has moved them from the bottom to the top of our test, and it was sorely needed. My wife still owns and uses the Yoga 2 Pro every day, and her one major complaint is the wireless performance. The new model solves that and then some.

For 2015 though, Lenovo has some serious competition. If you are after a pure Ultrabook, the Yoga 3 Pro is likely not the frontrunner right now. Lenovo does have other offerings, such as the non Pro version of the Yoga, and the ThinkPad Yoga, which do come with Broadwell-U and would have better performance for heavier workloads. However I have yet to see a better convertible laptop yet. Other OEMs have taken the Yoga style hinge and incorporated it into their designs, and we will see more of these as time goes on.

The Yoga 3 Pro is at least as good as the Yoga 2 Pro, which is a compliment. After owning the Yoga 2 Pro for over a year, it is still incredibly handy to be able to flip the display around and use it as a touch device. The new Yoga 3 Pro improves the overall design, and makes it even thinner and lighter than the outgoing model. The Yoga 3 Pro is even thinner than the just announced MacBook, and although it is also a bit heavier, it does include a touch digitizer and Gorilla Glass over the display, all the while coming in at $1150, around $150 cheaper than the MacBook.. Apple has also seen that Core M, especially the just released 5Y71 model, is enough performance to not have any regression over Haswell-U which powered all of the Ultrabooks last year. If battery life is not your biggest concern, then the Yoga 3 Pro is certainly worth checking out. It offers incredible versatility due to the design, and it has made some nice improvements for the new model.

Battery Life, Wi-Fi, Speakers, Noise, and Software
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  • Brett Howse - Friday, March 13, 2015 - link

    Sorry corrected the TDP info. We can debate about whether it is an Atom or Celeron, but it's really an Atom rebadged.
  • jhoff80 - Friday, March 13, 2015 - link

    I think you missed one. "The 5 watt Atom core in the HP Stream is sorely outclassed by the 4.5 watt Core M."
  • kepstin - Friday, March 13, 2015 - link

    Not sure what you're saying here... Bay Trail is the latest evolution of Intel's Atom series of processor core designs. While they're not using the Atom brand for it any more, that's still pretty much what it is.
  • azazel1024 - Friday, March 13, 2015 - link

    But the point is, it isn't the atom brand. It is the same architecture, but compared to the actual TABLET chips, in some ways it is worse. You have higher TDP, but the CPU is actually worse in a lot of ways, especially multithreaded tests. You've got 2 cores at up to 2.58GHz, where as the top end Atom Bay Trail chips you have 4 cores at up to 2.39GHz. I can attest in long work loads in passively cooled tablets, the z3775 doesn't really seem to throttle...so you have potentially close to a doubling of performance in highly threaded workloads for something like the z3775 compared to the N2840...which makes the whole CPU performance inbalance between "Atom" and "Broadwell M" a heck of a lot less than these tests make it out to be.

    Oh...there still is, but in highly threaded work loads the inbalance isn't all that much.

    On the GPU side of things...well N2840 or z3775 (or other Atom chip), Broadwell M still crushes it.

    It'll be interesting to see how the top end Atom Cherry Trail chips stack up. Assuming ZERO IPC improvements (and I assume there will be at least a little), it clocks in ~200MHz faster than Bay Trail and 4x the EUs (Intel was claiming top clocks of 2.6GHz and 16EU for the top end Cherry Trail tablet chips). The current pre-release Intel claims of ~100% faster GPU with no CPU claims right now.

    Still makes Cherry Trail a fair amount slower on the GPU side of things, but on the CPU side...that puts it spitting distance with Broadwell M for multithreaded and if there are modest IPC improvements it might actually actually be FASTER in some multithreaded workloads.
  • extide - Friday, March 13, 2015 - link

    It's not hard to imagine a quad core beating a dual core in multi threaded... Remember though, that in normal use, the feeling of it being fast or slow is all about single threaded speed.

    Also, don't get all confused with the brand names. There are 2 cores, the Atom core and the 'Core' big core -- it doesnt matter whatever brand name they use it is still either Intel's big core or little core.
  • fokka - Friday, March 13, 2015 - link

    i think you are reading too much into the branding. it's still atom, which still means somewhat poor single threading, poor graphics, but quite ok multi threading, since there often are four cores instead of the two cores you get in all of intels other sub-35w mobile parts.

    i think intel doesn't do itself a favour spreading the celeron and pentium brands to the atom architecture, but here we have it, let's not make it any worse.
  • Solandri - Friday, March 13, 2015 - link

    Intel's marketing division is just trying to confuse people by extending the Celeron and Pentium names to CPUs with the Silvermont architecture, so they can sell computers with cheaper parts for more money.

    Most people use the term "Atom" to refer to Intel's (current) Silvermont architecture used in Atom, and now some Celeron and Pentium models. As opposed to Intel's Haswell cores (used in Haswell and Broadwell) used in their i3/i5/i7, as well as some of the Celeron and Pentium models.

    Since historically the Celeron name was only given to the upper tier architecture (Haswell, Sandy Bridge, Nehalem), it's more accurate to call the N2840 an Atom than a Celeron. Calling the N2840 a Celeron is kinda like calling the 4-cylinder Mustang a Mustang. The performance just isn't there to back up the name.
  • mkozakewich - Saturday, March 14, 2015 - link

    Doesn't "Mustang" mean performance, though? If you get a Celeron computer, you're expecting something cheap and just fast enough to use for basic tasks.
  • extide - Friday, March 13, 2015 - link

    ...Which means it's an Atom.
  • jabber - Friday, March 13, 2015 - link

    First thing I'd do if that was mine? Get rid of those awful stickers.Like those dumb car parts shopping lists muppets stick on their mom's Civic.

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