Qualcomm’s big value-add to the laptop space last year, alongside running Windows on the company’s smartphone-focused Arm processors, was both battery life and mobile connectivity, promising performance, 20+ hours of use, and the ability to always be connected to the internet without the need to piggy back on a Wi-Fi signal. This year Qualcomm is launching its second generation Always Connected PC (ACPC) platform, and the Snapdragon 850 SoC, to power the new wave of devices.

Qualcomm’s Always Connected PCs

Pushing modern x86 processors out of the PC and notebook space is a monumental task. Trying to push Windows and its large user base and large volume of software out of the way requires an investment way larger than anyone realises. The alternative is to ride shotgun, and run a mix of translated and native compiled code, but a new entrant needs more than that. Having lived with x86 laptops for two decades, the most prolific home users and commercial users have their workflows embedded into their human personalities – certain software has to perform in an expected way, and as a result, disruption has to being by replacing like-for-like in order to succeed, followed by additional benefits.

Qualcomm’s ACPC platform was originally designed to do this. Run the operating system that most people use, and have a number of the top applications that people also use (such as Office, Outlook) run natively on the hardware. For users that have obscure programs built for x86, the instructions are translated for the Arm based hardware with a minimal performance drop. The benefits therein were designed to be based on battery life (lower power than x86, plus lower motherboard space requirements allowing for more battery) and mobile connectivity (integrated modem, rather than bulky external modem). These are two of the top features that most premium users are willing to pay extra for, but the goal is to have them inside mid-range and premium style devices, rather than just for the high-end (or not at all).

Last year’s ACPC platform, based on the Snapdragon 835, was launched to mixed reviews. Despite HP, ASUS, and Lenovo being partners, it took a while for each of them to get out of the door, and even then, the HP was priced very high, and the ASUS was launched only in Taiwan. Reviews of the units focused either on the higher than expected price of the HP, or the responsiveness of the system interpreted through traditional x86 benchmarks. Most reviews in that ecosystem were from x86 laptop users, unfamiliar with the intricacies of machine translation, using peak-performance x86 benchmarks on Windows, such as CineBench. The problem Qualcomm had was that users were unable to the typical operating system delays from the additional latency introduced by the translation of the chipset. With the goal being parity with the incumbent, users had an idealised view of what this should be, so when x86-focused benchmarks underperformed, negative comments resulted. Coupled with this, even fast Gigabit LTE connectivity can add additional latency to web responsiveness, whereas non-mobile connected machines that people are used to are to piggybacking from Wi-Fi with wired backhaul which has minimal latency. While the promise of battery life was there, along with always being connected, the user experience wasn’t as perfect as first envisioned, especially when it is not obvious what parts of the user experience were attributable to which company.

Snapdragon 850: More Performance, More Battery Life, More AI, More Systems

Qualcomm’s new Snapdragon 850 follows on from the Snapdragon 835 almost a year after. The Snapdragon 850 is built from the silicon as the Snapdragon 845, and uses the benefits that the flagship mobile chip introduces for this generation. This time around however, rather than calling it the Snapdragon 845, similar to the chip inside popular smartphone flagships such as the Samsung Galaxy S9/S9+, LG G7, HTC U12+, and OnePlus 6, Qualcomm is differentiating it by upping the number. The Snapdragon 850 uses the same silicon floorplan as the Snapdragon 845, however the frequencies and firmware are tweaked for extra performance.

Qualcomm Snapdragon 850 vs 845 vs 835
SoC Snapdragon 850 Snapdragon 845 Snapdragon 835
CPU Large Cores 4 x Kryo 385 Gold
@ 2.95 GHz
4 x 256 KB L2
4x Kryo 385 Gold
@ 2.8GHz
4 x 256 KB L2
4x Kryo 280 Gold
@ 2.45GHz
2MB L2
Small Cores 4 x Kryo 835 Silver
@ ? GHz
4 x 128 KB L2
4 x Kryo 385 Silver
@ 1.77 GHz
4 x 128 KB L2
4 x Kryo 280 Silver
@ 1.90 GHz
1 MB L2
DSU 2 MB L3 2 MB L3 -
GPU Adreno 630 Adreno 630 Adreno 540 @ 670/710MHz
Memory ? 4x 16-bit CH @ 1866MHz
LPDDR4x
29.9GB/s

3MB system cache
4x 16-bit CH @ 1866MHz
LPDDR4x
29.9GB/s
ISP/Camera Dual 14-bit
Spectra 280 ISP
Dual 14-bit
Spectra 280 ISP
1x 32MP or 2x 16MP
Dual 14-bit
Spectra 180 ISP
1x 32MP or 2x 16MP
Encode/
Decode
2160p 10-bit H.265
720p480
2160p60 10-bit H.265
720p480
2160p30 (2160p60 decode),
1080p120 H.264 & H.265
Integrated Modem Snapfragon X20 LTE
Cat 18/13
Snapdragon X20 LTE
Cat 18/13
Snapdragon X16 LTE
Cat 16/13
Mfc. Process 10nm LPP 10nm LPP 10nm LPE

Compared to the S845, the S850 has additional CPU frequency in play, with the Kryo Gold 385 cores having a 2.95 GHz turbo frequency rather than 2.80 GHz. The bigger differences occur comparing the S850 to the S835 platform.

Aside from the microarchitectural updates (Kryo 280 to Kryo 385, Adreno 500 to Adreno 630), the Snapdragon X20 modem can now reach speeds of 1.2 Gbps, and Qualcomm is going to leverage the AI capabilities of their Hexagon DSP a lot more with the new platform. The new platform, according to Qualcomm, should afford an additional +30% performance, +20% battery life, and +20% wireless speeds.

Playing to the platforms strengths, the battery life claim is one of Qualcomm’s key messages. Specifically, they state that the platform can now move from ‘all-day’ battery life to ‘multi-day’ battery life, and depending on the specifics of the platform, should allow users to go from day-to-day without charging, even with modem use.

On the modem, the Snapdragon X20 LTE modem now supports licenced 10 MHz spectrum with LAA, which Qualcomm states should allow for Gigabit connectivity speeds in 90% of the worldwide LTE markets when combined with carrier aggregation technology.

The S850 also uses the upgraded audio and video codec features we saw in the S845. This includes support for H.264 and HEVC 4K encode and decode for video playback services, and support for extended 4K video capture from integrated cameras. On audio Qualcomm is stating improved dynamic range and reduced harmonic distortion metrics on its audio codec, but no exact numbers were given. Both analog and digital audio output is supported with Qualcomm’s Aqstic and aptX technologies.

Updates to Windows on Snapdragon

For this next release, Qualcomm is keen to talk about how AI is being implemented with Snapdragon 850, along with the availability of natively compiled code without having to rely in the instruction translation layer. With the latest Windows April 2018 update, the Snapdragon based systems will be compatible with Windows machine libraries compiled for Arm based processors. At present, Cortana is accelerated using the Hexagon DSP, and other assistants are in the works to also be hardware accelerated. Microsoft Edge will also be re-optimized for the platform.

Qualcomm stated that they have been working further with Microsoft to bring RS4 to the next generation of ACPC devices, fixing a number of initial software compatibility issues that arose from the initial launch, allowing more programs to run as intended. Qualcomm has implemented a 64-bit SDK for developers looking to optimize their code, with the general mantra being that it is better to focus on native 64-bit applications on ARM rather than emulate. 64-bit emulation is still a work in progress, however Qualcomm has noted that a fair amount of software is compiled in 64-bit mode even if the program cannot take advantage of it, so the company is hoping that the 64-bit SDK can alleviate some of those edge cases.

One poignant part of 2018 has been security, and Qualcomm is stating that most of the Spectre and Meltdown issues are patched with the new platform. With new Smelt-style attacks coming through the pipe, they cannot legally say ‘all’ of the issues, but there is a team of engineers in play, as with all vendors, for what will be whack-a-mole for the foreseeable future. Qualcomm states that users will be patched as new problems arise as soon as is possible.

Snapdragon 850 Always Connected PCs: New Partners, More Systems

The focus of S850-based ACPCs, according to Qualcomm, is going to shift from traditionally PC-based companies to more mobile-focused companies. HP, Lenovo, and ASUS are all expected to implement refreshes or new designs, however we were told to expect the traditional mobile companies to get onboard. These companies are more used to a yearly cadence update cycle, which combines well with the research (as published by Intel and others) that new form factor users tend to update more frequently than traditional users. No particular companies were mentioned, however we could imagine companies like Samsung, LG, Xiaomi, and Huawei might be some of them. Each company will perform their own announcements in due course.

One interesting discussion point to come out of this during our discussions with Qualcomm is one of expertise. Traditional laptop makers might not have a refined skill set for designing laptop-style platforms with a focus on mobile platform-like characteristics, such as wireless carrier connectivity. It was reported in the first generation that ASUS, who has a history in smartphones and antenna placement, had a better carrier connectivity than the others, despite using the same hardware – this was down to antenna placement and chassis design.

For the new platform, Qualcomm is offering more assistance to the OEMs and vendors when it comes to reference designs and components, with one example being a reference modem design and layout. These laptop designs can, if they want, take a reference design module and implement it in their designs as-is, taking other benefits such as pre-approved carrier certification that can come along with the turn-key design. We were told, specifically with the case of the modem reference design at least, that some OEMs will be using it for the first wave of Snapdragon 850 designs, and there will be partnerships with carriers in specific regions in play for the new portfolio.

Computex 2018

This announcement is during Computex 2018, and we might be seeing some devices using the new platform behind closed doors or actually being announced on stage. Qualcomm and its partners still have to fight the early first/second generation adoption pains that come with a re-imagined device category, however we will hopefully see a wider selection and a wider distribution this time around.

For those waiting for 5G, the smart money is likely to wait for the Computex 2019 announcements next year.

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36 Comments

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  • bubblyboo - Monday, June 04, 2018 - link

    So just a slightly OC'ed 845 then? Reply
  • Ryan Smith - Monday, June 04, 2018 - link

    So far it seems that way. Reply
  • Alexvrb - Tuesday, June 05, 2018 - link

    Well with a higher TDP ceiling (and better cooling) it can also sustain performance for longer than most phones with the same chip.

    With that being said if they're smart they'll also support higher-voltage, higher-clocked RAM. Even 2133 would be a nice step up from the 1866 LPDDR4x smartphones use.
    Reply
  • serendip - Monday, June 04, 2018 - link

    This could be the chip that finally replaces Cherry Trail Atoms. I assume Xiaomi and other Chinese OEMs can make Snapdragon Windows tablets at $500 or less. I thought it was incredibly dumb for HP and Lenovo to make $1000 ARM tablets that can't run a lot of older x86 programs. Reply
  • Cliff34 - Monday, June 04, 2018 - link

    The problem is price point.. They were selling them for 1k bc they want to market them as premium product, not cheap laptop so they can get a bigger margin. They market the long battery life as a reason for the premium price. For me and also as the sales show, battery life is not the only factor. Plus laptops are getting pretty good battery life with 8 hr or so.

    But when you get to the higher end price points like 700+, all of a sudden Intel chips becomes more at attractive as an alternative.

    Of course they can price at 500 bucks but no one wants to get into that market bc that market is so saturated by laptops. And you don't make that much from it.
    Reply
  • Alexvrb - Tuesday, June 05, 2018 - link

    He was specifically talking about tablets. There aren't many Windows tablets in the $500 and under range, and the ones that exist primarily run old Cherry Trail-T. They could definitely fill the void left by devices like the Surface 3, since Intel pulled the plug on ULP Atom

    Anyway it's really up to OEMs what they want to do. I understand they were aiming for premium, but they were too late to the market with the SD 835, and they shot too high. Regardless of laptop or tablet, they need to back off the price a bit.
    Reply
  • Manch - Tuesday, June 05, 2018 - link

    I wonder how damaging that blunder is for WoA. They just came out and now 850 is pending. Very few early adopters, meh performance. It screams RT all over again. yes I know emulation....but no, its not as good and the impact is very noticeable. makes me think they should have waited for this instead. I for one will not be an early adopter. MS + ARM = I'm staying away. Burned up too much money on that boondoggle. Reply
  • serendip - Tuesday, June 05, 2018 - link

    I'm running a $200 Cherry Trail tablet as my ultralight travel machine and it's fine, although battery life isn't great at 7 hours. An SD850 machine could get equivalent performance for ARM apps and double the battery life.

    Windows on ARM was a mistake in pricing, not in features. A lot of Store apps are already compiled for ARM so speed shouldn't be an issue; open source x86 Win32 programs could be recompiled for ARM so that's not an issue either. Either way, performance will be better than on Atom. The problem is that no one wants to spend $1000 on an ARM machine when you can get a Surface M3 for $700 and that runs full x86. $500-800 for Snapdragon PCs sounds more reasonable.
    Reply
  • Manch - Tuesday, June 05, 2018 - link

    Yes price is a big factor. I aint paying that kind of price for gimped performance. When I can get XPS 13 or a Thinkpad for $800-$900, with 15/16hrs of battery life, and zero compatibility issues compared to WoA, then nope. If WoA offered something orders of magnitude better then maybe. I'm not convinced. At current prices, I definitely aint convinced. Reply
  • Martijn ter Haar - Tuesday, June 05, 2018 - link

    HP's current ARM on Windows machine is marketed as an iPad Pro competitor. Compared to that, it is actually a bit cheaper for similar specs. However, like you, most people don't compare it to the iPad Pro, but to x86 laptops and conclude that they get less performance for a higher price. Reply

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