Inside the Snapdragon 888: The features you’ll find in 2021’s premium phones
From 5G carrier aggregation to variable rate shading to the staggered HDR for photos and video.
Smartphones built upon Qualcomm’s upcoming Snapdragon 888 processor will be able to take advantage of concurrent recording and HDR using three different cameras, a creative feature that will allow consumers and content creators additional options for crafting the perfect photo and video. It’s one of many new features inside the new Snapdragon 888 mobile chip, including integrated 5G.
The Snapdragon series represents the chief opposition to the Apple iphone and its A-series processors, powering rivals like the Samsung Galaxy S20 and the Oneplus 8 series. The new Snapdragon 888 will ship inside flagship smartphones beginning in the first quarter of 2021.
Qualcomm introduced the Snapdragon 888 ( go.pcworld.com/s888) and its basic
capabilities at its virtual Snapdragon Technology Summit opening keynote on December 1. The company spent the next day diving deeper into the chip’s capabilities.
The Snapdragon 888 will continue expanding on its various axes: computational performance, graphics performance, AI, and more. Qualcomm says the chip will be manufactured on a new 5nm process, helping its new Kryo 680 CPU core achieve 25 percent faster performance than its predecessor, and the new Adreno 660 core perform 35 percent faster than before. The 888 also includes the Hexagon 780, the new Spectra 580 ISP, and the integrated X60 5G modem—the first time an 8-series Snapdragon has had an integrated 5G modem.
WHAT’S INSIDE THE SNAPDRAGON 888
Below is a high-level overview of the Snapdragon 888. For more granular comparisons, you can refer back to our coverage of the prior Qualcomm Snapdragon 865 ( go.pcworld.com/sp86) .
Kryo 680 CPU: Octo-core architecture; 1 ARM Cortex-x1 ( go.pcworld.com/ctx1) (2.84GHZ, prime) + 3 ARM Cortex A-78 (2.4GHZ, performance) + 4 ARM Cortex-a55 (1.8GHZ, efficiency)
Memory support: embedded LPDDR5 (3200MHZ), LPDDR4X (2133MHZ); up to 16GB
Adreno 660 GPU: internal/external displays up to 4K/60HZ, or 3200x1800/ 144Hz; HDR10+ support; HDR gaming
@10-bit, H.265/ VP9 hardware decoder
Spectra 580 ISP: 200MP still images (84MP/30 fps, single camera; 64MP + 25Mp/30fps, dual-camera; 28MP/30 fps, triple camera); 8K video capture@30 fps; 4K video capture + 64MP photo; slow-mo 720p @ 960fps
Hexagon 780: Total Harmonic
Distortion + Noise (THD+N) Playback: -108db
Connectivity (5G): integrated X60 5G modem (7.5Gbps down, 3Gbps up, via 5G); mmwave (800MHZ bandwidth, 2x2 MIMO), Sub-6ghz (200MHZ bandwidth, 4x4 MIMO); LTE support (CBRS, WCDMA, HSPA, TD-SCDMA, CDMA 1x, EV-DO, GSM/EDGE)
Connectivity (Wi-fi): Fastconnect 6900 (Wi-fi 6e/802.11ax, 802.11ac), 3.6 Gbps peak speeds, 4K QAM, OFDMA; MU-MIMO (up to 8x8 MU-MIMO)
Connectivity (Bluetooth): Bluetooth 5.2, with support for Qualcomm aptx voice specifications
Qualcomm Sensing Hub (2nd gen): Always-on far-field detection and echo cancellation; support for multiple voice assistants
Power: Quick Charge 5; supports 100W chargers, can charge to 50% in 5 minutes
Unlike with the Snapdragon Compute chips for Windows on Arm, the Kryo 680 CPU at the heart of the Snapdragon series has never been top-of-mind for smartphone buyers, mobile gamers excluded. With the Snapdragon 888, however, there are two key features: a new ability to sandbox apps within virtualization, and a Cai-qualified camera.
Virtualization allows your smartphone to function as both a work device and as a personal device, with specific versions of the Android OS for both. (Samsung’s Knox has something like this already.) It also allows micro-os’s for specific apps like wireless payments, explained Ziad Asghar, vice president of product management for Qualcomm.
Snapdragon 888 smartphones have also
been qualified as the first Cai-compliant smartphone camera. The Content
Authenticity Initiative (go.pcworld.com/cnai) and Truepic, plus Adobe, Twitter, and the
New York Times, worry that photos are being stolen and altered without the photographer’s consent or knowledge. CAI will allow CAI-qualified cameras to create a cryptographic “seal” around an image, Asghar said, preserving date, time location, pixel count and the depth map.
The Kryo 680 is 25 percent faster than the Kryo core within the Snapdragon 865, and 25 percent more power efficient, too.
From a connectivity standpoint, the Snapdragon 888 is notable for three major features: integrated 5G, carrier aggregation, and Wi-fi 6E. To date, every 5G modem that Qualcomm has shipped alongside the Snapdragon has been a standalone device like last year’s X55 modem ( go.pcworld. com/x55m). Now, the new, third-generation X60 modem has been integrated with the Snapdragon 888, alongside the Qualcomm Fastconnect 6900 engine, which governs its Wi-fi capabilities.
Qualcomm isn’t disclosing the total power draw of its Snapdragon 888 yet, but the new 5nm process, plus the modem integration, typically means lower power consumption and therefore longer battery life. Available throughput, however, remains the same as the X55: a theoretical peak bandwidth of 7.5Gbps downstream and 3Gbps upstream.
More significantly, Qualcomm’s thirdgeneration X60 modem offers an olive branch of sorts between the 5G mmwave and sub-6ghz technologies. Essentially, mmwave offers blazing-fast throughput, but clustered around “hotspots” with ranges limited to something like yards, rather than miles. (Qualcomm and Ericsson have showed off [ go.pcworld.com/qler] 5G mmwave-nr
technology at over 100Mbits at 5 km, though it hasn’t been commercially deployed.) So-called “sub-6” 5G has been deployed by carriers like T-mobile; it offers somewhat comparable coverage as 4G LTE, but with higher bandwidth.
As Technysis analyst Bob O’donnell points out ( go.pcworld.com/bodl), though, T-mobile’s “5G” speeds are enabled by a technology called 5G NR Dual Connectivity, which ties existing 4G wireless channels to 5G, enabling a quick-and-dirty increase in bandwidth that’s about 20 percent faster. The 4G “anchor band” will eventually go away, leaving 5G carriers to operate in what’s known as “standalone mode.”
The X60 allows what’s known as sub-6 carrier aggregation, which combines several sub-6ghz channels, increasing the available throughput without the need for mmwave coverage. Carriers in the United States are currently adding that capability, according to Qualcomm. The X60 also supports mmwavesub-6 aggregation for even more bandwidth, but that’s due to be rolled out by U.S. carriers late in 2021.
Don’t forget about Wi-fi 6E. The Fastconnect 6900 now supports the 6GHZ channel that Wi-fi 6E added. Wifi 6E’s 6GHZ channel has been scooped up by mesh routers as a dedicated backchannel to the home gateway, uninterrupted by the mishmash of 2.4GHZ and 5GHZ communications on Wi-fi 6 routers. Smartphones using the Snapdragon 888 will be able to tap into it, too.
Other noteworthy features include Bluetooth 5.2 with not one but two antennas. Bluetooth 5.2, launched last January, lowers the power draw, improves audio quality, and most importantly, adds multistream audio, which could allow you to stream music to a public speaker while still taking a private call on your Bluetooth earbuds.
For many, the smartphone camera continues to be one of the key criteria
when buying a smartphone. With the Snapdragon 888 you’ll see an upgrade in how the smartphone camera captures images and video: faster and smarter focusing, better low-light capabilities, as well as computational HDR for 4K video. It’s all enabled by the new Spectra 580 image processor within the Snapdragon 888.
The Spectra 580 will be able to capture three 28 MP still images from three smartphone cameras, simultaneously. Both 4K/120-fps video capture and playback are supported (at 12 MP @ 20 fps), or, a user will be able to shoot 120 still images in a second. All told, Qualcomm claims that the Spectra 580 is 35 percent faster than its predecessor, capable of handling 2.7 gigapixels per second.
It’s the triple-engine capability that Qualcomm really believes makes a difference, however. Previous Spectra ISPS allowed a phone to capture images and video from two of three cameras simultaneously: even with three lenses to choose from: wide, ultrawide, and telephoto. The Spectra 580 allows all three cameras to capture at once, meaning you’ll be able to switch among them on the fly. Video using a Snapdragon 888-powered phone will also be able to be captured and played back at 120 fps, a capability that the previous Snapdragon 865 lacked.
Recording three different images at once also means that the smartphone camera can create a composite of those three different images, the basis of HDR. So-called “staggered HDR” sensors have been used in other cameras but are making their way to
mobile. When they do, smartphones using the Snapdragon 888 will be able to record video using the three different cameras, take their light and dark image detail, and composite them together quickly enough to allow for 4K video with computational HDR applied to each frame, rather than just a still image.
Last year, Qualcomm began signaling that it would begin adapting its AI expertise to its camera functions, and we’re seeing more evidence of that. This is the first time that its so-called 3A functions (autofocus, auto-exposure, and auto-white balance) will be powered by AI. Qualcomm said it had trained its autofocusing capabilities using neural nets and VR. That part of an image that a human naturally focused upon first will be used as a model for your smartphone camera’s focus.
Qualcomm also said that it had worked with Arcsoft, a developer of both embedded firmware and imaging apps, to automatically zoom, too, narrowing in on what the camera thinks is the most important element of the photo. Imagine a camera tracking a bride as she walks down the aisle, with the smartphone using the three cameras to automatically keep the bride’s face in the same proportions as she draws closer.
You’ll see improved still images with the Spectra 580, too: richer 10-bit photo capture using the HEIF file format (with 1 billion shades of color) is now available, versus just an 8-bit tone-mapped JPEG. Last but not least,
Qualcomm has also promised that it will be able to adapt its AI and image-processing capabilities to capture images in as little as 0.1 lux—that’s going to equate to much better “Night Sight” and similar low-light functions in Snapdragon-powered phones.
Qualcomm said it had worked with Morpho to evolve another unique feature, too: applying AI to multiple elements of a scene. Have you used phones that apply “beauty mode” to a landscape screen, or a portrait? The 888 will be able to apply multiple modes to a single scene, so that a photo of a boy running in a field will enhance the person, grass, and sky in a single scene.
The Snapdragon 888 uses the Adreno 660 GPU, a chip Qualcomm describes as both 35 percent faster in terms of rendering, and 20 percent more power efficient than its predecessor, inside the Snapdragon 865.
The Snapdragon 888 is the first Snapdragon processor to implement variable rate shading (VRS), a technique Nvidia helped introduce with its RTX 2xxx (Turing) GPUS. VRS works something like foveated rendering in VR; in either case, processing power is concentrated in an area where the game knows your eye is looking, and uses far less rendering where your eye isn’t. (This 3Dmark video [ go.pcworld.com/3dvd] explains the VRS technology in more detail.) Qualcomm says that can reduce the number of pixels that need to be shaded by about 30 percent, allowing the 888 to render a scene more quickly than otherwise, resulting in faster frame rates. (Within the 865, Qualcomm claimed it could reach up to 144 fps.)
That’s not the only feature Qualcomm has taken from its desktop GPU cousins. Just as Brad Chacos tested the latency on a (nontouch) display ( go.pcworld.com/ltnc) introduced to games, Qualcomm has worked to minimize the latency a touchscreen can introduce.
Qualcomm Game Quick Touch is a new feature that greatly reduces touch latency, syncing the refresh rate of the game to the touch input to keep “delayed frames” from slowing down the corresponding touch input as well. Touch latency can be reduced up to 20
percent at games running at 60 fps, Dave Durnil, Qualcomm’s senior director of engineering and head of gaming, explained. It’s all geared to the mobile e-sports community, and the estimated 2.6 billion mobile gamers around the world.
AI continues to be one of the more abstract functions within a desktop and a mobile processor, and the 6th-gen AI Engine’s improvements within the Snapdragon 888’s Hexagon 780 processor seem abstract as well. Qualcomm claims that the engine now supplies up to 26 trillion operations per second (TOPS). “That is more than any other product out there, and it is basically the biggest leap for Snapdragon year over year from an AI capability perspective,” Asghar said.
By placing the scalar, tensor, and vector accelerators next to one another, the workloads can be shared among them. This helps the 888’s scalar performance improve by 50 percent, Asghar said. Ai-powered functions, such as those processed by the Adreno 660 GPU, are accelerated by 43 percent. The Hexagon DSP also works in concert with what Qualcomm calls the 2nd generation Qualcomm Sensing Hub, which integrates a dedicated low-power AI processor to enable use cases like screen wake, and senses whether your fingers are truly interacting with the smartphone and its display, or are just idly brushing them. Put another way, the phone can also detect whether you’re in a quiet room or a busy airport, and adjust the ringer volume together.
Qualcomm also showed off a demo from Trinamic, a division of BASF, that could even use your phone’s sensors to examine and analyze your skin, and detect which skin product to use that day.
Last year, Qualcomm announced the 765G and 765, too, providing a reduced subset of features for a lower price. Qualcomm hasn’t announced these lower-powered processors for more affordable smartphones. We’d expect to see those soon.