We’re here in Maui for the second day of Qualcomm’s fourth annual Snapdragon summit, for what is probably the most exciting part of the event, as we cover the disclosure of the intricate details of the brand new Snapdragon 865 and 765 SoCs that the company had briefly announced yesterday.

Indeed, this year, Qualcomm isn’t launching just one SoC, but rather two new platforms at the same time. The Snapdragon 865 is self-explanatory in its positioning; as a direct successor to the Snapdragon 855 we expect the new chip to represent the best Qualcomm is able to deliver, and be the silicon that powers most of 2020’s flagship devices. The new top-model this year is accompanied by the new Snapdragon 765 and 765G SoCs. As with other 7-series models since the launch of the new range, the new generation adds of the new features introduced with the new Snapdragon 865, at a lower performance level and a more affordable price for what is becoming an increasingly popular device category.

Qualcomm Snapdragon Flagship SoCs 2019-2020

Snapdragon 865

Snapdragon 855
CPU 1x Cortex A77
@ 2.84GHz 1x512KB pL2

3x Cortex A77
@ 2.42GHz 3x256KB pL2

4x Cortex A55
@ 1.80GHz 4x128KB pL2

4MB sL3 @ ?MHz
1x Kryo 485 Gold (A76 derivative)
@ 2.84GHz 1x512KB pL2

3x Kryo 485 Gold (A76 derivative)
@ 2.42GHz 3x256KB pL2

4x Kryo 485 Silver (A55 derivative)
@ 1.80GHz 4x128KB pL2

2MB sL3 @ 1612MHz
GPU Adreno 650 @ ? MHz

+25% perf
+50% ALUs
+50% pixel/clock
+0% texels/clock
Adreno 640 @ 585 MHz

DSP / NPU Hexagon 698

(Total CPU+GPU+HVX+Tensor)
Hexagon 690

(Total CPU+GPU+HVX+Tensor)
4x 16-bit CH

@ 2133MHz LPDDR4X / 33.4GB/s
@ 2750MHz LPDDR5  /  44.0GB/s

3MB system level cache
4x 16-bit CH

@ 1866MHz LPDDR4X 29.9GB/s

3MB system level cache
ISP/Camera Dual 14-bit Spectra 480 ISP

1x 200MP or 64MP with ZSL
2x 25MP with ZSL

4K video & 64MP burst capture
Dual 14-bit Spectra 380 ISP

1x 48MP or 2x 22MP

8K30 / 4K120 10-bit H.265

Dolby Vision, HDR10+, HDR10, HLG

720p960 infinite recording
4K60 10-bit H.265

HDR10, HDR10+, HLG

Integrated Modem none
(Paired with external X55 only)

(LTE Category 24/22)
DL = 2500 Mbps
7x20MHz CA, 1024-QAM
UL = 316 Mbps
3x20MHz CA, 256-QAM

(5G NR Sub-6 + mmWave)
DL = 7000 Mbps
UL = 3000 Mbps
Snapdragon X24 LTE
(Category 20)

DL = 2000Mbps
7x20MHz CA, 256-QAM, 4x4

UL = 316Mbps
3x20MHz CA, 256-QAM
Mfc. Process TSMC
7nm (N7P)
7nm (N7)

We’ll start off with the whole story on the Snapdragon 865, and in particular one surprising aspect what we didn’t expect from the SoC this year; its lack of an integrated modem, and what the story behind the design choice.

No Modem Integration This Year?

The one aspect of the new Snapdragon 865 that overshadows all other new characteristics is the fact that Qualcomm designed it without an integrated modem. Qualcomm already announced this change yesterday during the day 1 of the event, without much context into the matter. It’s been fun seeing the reactions of various media and commenters theorising as to why this would be. It’s also one of the very first aspects that we wanted to have clarified by Qualcomm:

The choice to not integrate the modem this year was a highly practical one, stemming from the complexity of 5G and the platform. There are actually more nuances to this though, and one thing that Qualcomm wants to make clear, is that this isn’t just a matter of the company's technical ability to actually create a chip with an integrated 5G modem; it’s keen to point out the Snapdragon 765, also announced today, which does exactly this.

Instead, the technical difficulty of the 5G modem platform is actually on the platform and device side itself. As this will be the very first wide-range 5G implementation of a lot of OEM vendors who use Qualcomm’s chips, there will be a large number of designs who will be integrating 5G for the first time. The problem is that this requires a quite large development increase for the vendors creating the devices: they need to make sure their RF systems, antenna designs, as well as certifications of the systems are in full order. The nature of the 5G design complexity means that this process in a device’s development cycle this time around is actually quite a lot more complicated and more time-consuming than what we’ve seen from past 4G phones.

Qualcomm’s solution to the problem, in order to facilitate the vendor’s device development cycle, is to separate the modem from the rest of the application processor, at least for this generation. The X55 modem has had a lead time to market, being available earlier than the Snapdragon 865 SoC by several months. OEM vendors thus would have been able to already start developing their 2020 handset designs on the X55+S855 platform, focusing on getting the RF subsystems right, and then once the S865 becomes available, it would be a rather simple integration of the new AP without having to do much changes to the connectivity components of the new device design.

Qualcomm’s explanation makes a lot of sense in practical terms, and would bring time-to-market advantages. The company explains that in the future, it would re-integrate the modem back into the SoC, and this generation’s choices just made more sense for today’s situation in the market. Qualcomm isn’t the only one to have made such a choice, Samsung’s Exynos 990 SoC makes the same exact design decisions, shipping the main SoC as a simple application processor without any modem, although we don’t have any official backstory on their rationale for the design choice.

The decision of shipping AP+discrete modem does have some disadvantages though. Motherboard PCB complexity does go up this generation, more so than competitors solutions which are able to integrate 5G modems (Such as the HiSilicon Kirin 990 5G, or the MediaTek Dimensity 1000). We also expect some compromises in terms of battery efficiency due to the silicon overhead, however as a counter-argument, Apple’s iPhones always have had separate AP+modem solutions, and the latest generation this year had amongst the strongest battery life performance of any device out there, even with a competing Intel modem.

As for the X55 modem itself: It’s the same piece that Qualcomm announced earlier this year, and this time around promises full global 5G connectivity ability (the X50’s support was more limited). The modem chip is manufactured on the TSMC’s 7nm process node, and the most important fact about the new combination is that the Snapdragon 865 SoC is exclusively tied to the X55 modem. This means that Qualcomm is selling the 865 SoC only as a pair with the X55 modem, and they do not offer support with any past 4G modem. In theory vendors could use another modem, but since they only sell the new platform as a pair anyway, it would make very little sense for anybody to do this.

One question that also came up is on whether vendors, for whatever reason, would still be able to develop 4G phones with the Snapdragon 865+X55 platform. Qualcomm says this would be possible if you essentially just ignore the X55’s 5G capabilities, but they don’t see any reason for any vendor to actually do this. In essence, bar any abnormal decision from some vendors, all Snapdragon 865 devices in 2020 will be full 5G devices.

The Snapdragon 865 Application Processor: TSMC 7nm N7P

With the elephant in the room of the modem configuration being out of the way, we come to the actual Snapdragon 865 application processor.

For me, the biggest surprise of the new chipset was Qualcomm’s revelation that the chip is the fact that it’s manufactured by TSMC on the improved 7nm “N7P” node – this is the same manufacturing process as used by Apple’s A13 chipset. For the longest time were expecting this generation to be manufactured on Samsung’s 7nm EUV process (7LPP), given as the two companies had announcement nearly 2 years ago. It seems that the announcement was actually about the new Snapdragon 765, which does come on the 7LPP process node, and which we'll be covering in more detail later on in the article.

Qualcomm only's comment is that their process node choices were based on various considerations, including volume. Reading between the lines, it’s possible that Qualcomm wasn’t as confident in Samsung’s ability to manufacture the large quantities needed for the new chip. I’ve also heard murmurs from other sources that Samsung’s process simply doesn’t have as good performance and leakage characteristics as TSMC, and in flagship parts, those aspects have to be taken higher consideration than in say a premium- or mid-range SoC. In any case, it’s a big blow to Samsung’s foundry business as having the design win this year was quite critical, as I do not expect them to win the 2021 flagship contract due to TSMC’s 5nm leadership.

As for the choice between TSMC’s N7P and N7+ (+ is the EUV node), it seems HiSilicon is currently the only client for the node for the time being, with the Kirin 990 5G being the only chipset manufactured on the node until later in 2020. It’s most likely that TSMC here simply doesn’t yet have the EUV volume capacity and yields to fulfil Qualcomm’s demand at this point in time, essentially being in a similar situation as Samsung, with the only difference being that TSMC has a viable high-volume DUV-based process ready as an alternative.

Cortex-A77 Cores, Adreno 650 GPU, LPDDR5 Memory
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  • Kabm - Wednesday, December 4, 2019 - link

    It is on Anand/Android Authority some time ago. Kirin chip need room to intergrate 5G, So they will use A77 in 5nm. Probably they has two 990 chips developed paralled, A76 and A77. The first win the race first to intergrated 5G flagship chip. The later will be know as Kirin 1020.

    The Snapdragon 865 or Apple chips has the room because they don't have any modem intergrated with them, but at more cost, more power consumption. Currently the Huawei V30 is the cheapest 5G phone in the world, and it still has flagship chip. Mediatek chip specs `remains a question, because they declared it long ago but no one see any phone with it.
  • tuxRoller - Thursday, December 5, 2019 - link

    I had this article in mind (https://www.anandtech.com/show/14851/huawei-announ...

    I didn't notice anything said about die size being a limiting factor for this decision.
    Here's the relevant section:

    "A side note here: we had expected Huawei to launch the new Kirin with Arm’s latest A77 core, as it was announced earlier this year. Despite being a priority Arm partner member, the company’s technical team explained to us two things: firstly, the core decisions were made almost two years ago for this chip, but aside from that, they were not seeing the expected frequency from the A77 on TSMC’s 7nm processes.

    Huawei stated that even though A77 hits higher peak performance, the power efficiency of the A77 and A76 on 7nm is practically identical, however due to better experience with A76 on 7nm, they were able to push the frequencies of the core much higher. It was cited that other companies with announced A77 products were only achieving 2.2 GHz on similar process technologies at other fabs. It was stated that A77 will likely come on a future product, most likely when 5nm becomes more widely available."

    Make sense?
  • s.yu - Wednesday, December 4, 2019 - link

    Doesn't ZSL just apply to stacked exposures?...On second thought Samsung probably already uses some sort of stacking in its auto HDR.
    Between the HMX lagging for a split second during capture, single exposure, and...sensor level binning? I'm hoping for the lag but suspect single exposure is more likely.
  • s.yu - Wednesday, December 4, 2019 - link

    The bundled X55 is probably asking for a price bump on the price of the whole handset again, and for most people the 5G won't be touched for the lifetime of the device.
    To the surprise of nobody I guess?
  • Raqia - Wednesday, December 4, 2019 - link

    If your data plan pricing goes down due to greater carrier efficiencies using 5G, it would be worth it. The biggest initial benefit might not be speed but cost per unit of data.
  • s.yu - Wednesday, December 4, 2019 - link

    Yeah regarding that...I believe it relies on net neutrality, not available in all markets, as I commented in a previous article:

    Actually are you sure about that? Say you're covered by a 20MHz wide band at 700MHz, you're saying running 5G on this band is cheaper per bit than running LTE on this same band? This seems to be the opposite to what I've heard, rather it's possibly cheaper on higher bands with immense scale, which only means urban centers to support saturating that usage.
  • peevee - Friday, December 6, 2019 - link

    "If your data plan pricing goes down due to greater carrier efficiencies using 5G, it would be worth it."

    About as probable as somebody giving you $100 on the street.

    And of course their costs are not going down given that they will now have to incur all the capital costs of 5G buildout. While almost nobody would still use it.
    And mmWave is totally useless because of its physics.
  • Raqia - Tuesday, December 10, 2019 - link

    If one carrier starts offering you lower prices for the same data and the others don't follow suit, the others lose business so they had better follow suit. (It's up to regulators to keep this competition going and not allow collusion preventing competition here.)
  • Kabm - Wednesday, December 4, 2019 - link

    On the otherhand, the 865 chip look very big and a gamer chip, so Samsung may not use them on all S11 version.
  • Raqia - Wednesday, December 4, 2019 - link

    Die size and transistor count info would be appreciated Andrei, particularly for the 865 and the x55. :)

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