System Performance

One of the key internal changes that the OnePlus 3T brings to the table is a move from Snapdragon 820 to 821. At a high level, Snapdragon 821 is very similar to 820, and in the case of the OnePlus 3T it's really differentiated by its higher peak frequencies for the CPU and the GPU. Both have four of Qualcomm's Kryo cores in a 2 + 2 cluster configuration, and both use Qualcomm's Adreno 530 GPU. In the OnePlus 3 the performance cluster on the CPU had a peak frequency of 2.15GHz, which is brought up to 2.35GHz on the OnePlus 3T. On paper, this gives a performance improvement of roughly 10%, which is also what Qualcomm states in their marketing materials.

PCMark - Web Browsing

PCMark - Video Playback

PCMark - Writing

PCMark - Photo Editing

PCMark - Work Performance Overall

PCMark is a test that the OnePlus 3 performed exceptionally well in. This was due not only to the use of Snapdragon 820, but to software optimizations that OnePlus had made to the OS and the Android Runtime as well. The OnePlus 3T continues this trend, and provides performance improvements across the board. The writing and photo editing tests are the most interesting of the group, as these are tests where software optimizations helped the OnePlus 3 to pull ahead of other competing devices, and the OnePlus 3T pulls ahead even further. It bests the Huawei Mate 8 in the writing test to become the fastest device on record, and the photo editing test improves over the OnePlus 3 which was still the fastest device in the test up until now.

Kraken 1.1 (Chrome/Safari/IE)

WebXPRT 2015 (Chrome/Safari/IE)

JetStream 1.1 (Chrome/Safari)

The OnePlus 3T's JavaScript performance benefits from improvements that Google has made in Chrome 54, as well as the increase in peak CPU frequency compared to the OnePlus 3. In the interest of having a fair comparison, I've updated the OnePlus 3's results using the latest version of Chrome so it can also take advantage of optimizations that have been made.

Kraken and WebXPRT 2015 both demonstrate the OnePlus 3T's improved JavaScript performance. The gap is actually a bit larger than one might expect from a 10% increase in CPU frequency, and this could simply be the result of other changes made to the operating system in the newer version of OxygenOS, or changes to the DVFS settings that have been made alongside the change in SoC. Jetstream shows a smaller improvement, but it's in line with what you'd expect to see from the CPU bump.

Ultimately, Snapdragon 821 doesn't come with any mind-blowing performance improvements for CPU-bound applications, but the update does keep OnePlus on par with the competition, and allows them to take advantage of improvements in efficiency and errata fixes in addition to a modest performance uplift. Certain parts of the PCMark test also indicate that the 3T comes with additional improvements at the software level, which will hopefully make their way to the OnePlus 3 with the next major update to OxygenOS, but for now are something you only get on the OnePlus 3T.

Display: Re-Revisited GPU and NAND Performance
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  • igavus - Monday, November 28, 2016 - link

    I hope that history will start putting buttons on the right side though, cause the left side is firmly inside the the wallet and thus inaccessible. One could make the wallet open up on the wrong side.. but, why?! Reply
  • negusp - Monday, November 28, 2016 - link

    ...left-handed people? Reply
  • greyhulk - Monday, November 28, 2016 - link

    Wallet? Who the hell puts their phone in a wallet? Reply
  • MonkeyPaw - Monday, November 28, 2016 - link

    I think the poster means those wallet cases. For people who want a bulkier phone, all while looking like they are talking into their wallets! I guess it might be more practical if one also wields a purse? Reply
  • jaspreet - Tuesday, November 29, 2016 - link

    My office collegue got a pixel xl and has been showing off as to how good it is . I will be sending him this article which clearly shows that pixel xl is a much much poorer phone than a almost half priced One Plus 3T . Time to shut him up :) Reply
  • igavus - Tuesday, November 29, 2016 - link

    Well, it's the least bulky option of carrying everything I need in one item. Separate wallet, card holder, phone, key chain - even more bulk. As for talking to my wallet, you get used to it :) Reply
  • Meteor2 - Tuesday, November 29, 2016 - link

    I've had several different magstripe cards -- hotel key cards, shop loyalty cards, a credit card -- wiped, presumably by EM radiation from the phone, in wallet cases. Lesson learnt! I do use a wallet case though as they provide all-round protection without ruining the display with a screen protector. Reply
  • skeeter1234 - Thursday, December 01, 2016 - link

    Wallet cases have magnetic strips to keep the case closed.....bad for credit cards or anything close by with a mag strip.... Reply
  • leexgx - Wednesday, January 18, 2017 - link

    not a problem in the EU/UK as we use chip and pin (my mag strip mite be working mite not be I don't know nor care), but damaging the screen protector or the screen it self I have seenhappen in these type of cases Reply
  • lazarpandar - Tuesday, November 29, 2016 - link

    Lol what wallet are you talking about you spaz Reply

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