Revision as of 14:30, 24 September 2019

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Snapdragon 855
General Info
Designer	Qualcomm, ARM Holdings
Manufacturer	TSMC
Model Number	SDM855
Part Number	SM8150
Market	Mobile
Introduction	December 4, 2018 (announced) Q1, 2019 (launched)
General Specs
Family	Snapdragon 800
Series	800
Frequency	1,800 MHz, 2,420 MHz, 2,840 MHz
Microarchitecture
ISA	ARMv8 (ARM)
Microarchitecture	Cortex-A76, Cortex-A55
Core Name	Kryo 485 Gold, Kryo 485 Silver
Process	7 nm
Technology	CMOS
Die	73.27 mm² 8.48 mm × 8.64 mm
Word Size	64 bit
Cores	8
Threads	8
Max Memory	16 GiB
Multiprocessing
Max SMP	1-Way (Uniprocessor)
Packaging
Succession
Snapdragon 845
Contemporary
Snapdragon 855+

Block Diagram

Snapdragon 855 is a high-performance 64-bit ARM LTE system on a chip designed by Qualcomm and introduced in late 2018. Fabricated on TSMC's 7nm process, the 855 features four Kryo 485 Silver high-efficiency cores operating at 1.8 GHz along with three high-performance Kryo 485 Gold operating at 2.42 GHz and another higher-performance Kryo 485 Gold core operating at 2.84 GHz. The Snapdragon 855 integrates the Adreno 640 GPU operation at 600 MHz and features an X24 LTE modem supporting Cat 20 uplink and Cat 20 downlink. This chip supports up to 16 GiB of quad-channel LPDDR4X-4266 memory.

The Snapdragon 855 can be paired with Qualcomm's X50 5G modem (an external chip) and an RF front-end interface chip (RFFE) to bring 5G NR, sub-6 GHz and mmWave, support.

The 855 Plus is an identical, but a higher clocked version of this processor.

Cache

Main articles: Cortex-A76 § Cache and Cortex-A55 § Cache

1+3 core cluster Cortex-A76:

[Edit/Modify Cache Info]

Cache Organization Cache is a hardware component containing a relatively small and extremely fast memory designed to speed up the performance of a CPU by preparing ahead of time the data it needs to read from a relatively slower medium such as main memory. The organization and amount of cache can have a large impact on the performance, power consumption, die size, and consequently cost of the IC. Cache is specified by its size, number of sets, associativity, block size, sub-block size, and fetch and write-back policies. Note: All units are in kibibytes and mebibytes.

L1$ 512 KiB 524,288 B 0.5 MiB L1I$ 256 KiB 262,144 B 0.25 MiB 4x64 KiB 4-way set associative   L1D$ 256 KiB 262,144 B 0.25 MiB 4x64 KiB 4-way set associative   L2$ 1 MiB 1,024 KiB 1,048,576 B 9.765625e-4 GiB     4x256 KiB 8-way set associative

Quad-core cluster Cortex-A55:

[Edit/Modify Cache Info]

Cache Organization Cache is a hardware component containing a relatively small and extremely fast memory designed to speed up the performance of a CPU by preparing ahead of time the data it needs to read from a relatively slower medium such as main memory. The organization and amount of cache can have a large impact on the performance, power consumption, die size, and consequently cost of the IC. Cache is specified by its size, number of sets, associativity, block size, sub-block size, and fetch and write-back policies. Note: All units are in kibibytes and mebibytes.

L1$ 512 KiB 524,288 B 0.5 MiB L1I$ 256 KiB 262,144 B 0.25 MiB 4x64 KiB 2-way set associative   L1D$ 256 KiB 262,144 B 0.25 MiB 4x64 KiB 4-way set associative   L2$ 512 KiB 0.5 MiB 524,288 B 4.882812e-4 GiB     4x128 KiB 8-way set associative

• 2 MiB L3

Memory controller

[Edit/Modify Memory Info]

	Integrated Memory Controller
	Max Type LPDDR4X-4266 Supports ECC No Max Mem 16 GiB Frequency 2133 MHz Controllers 1 Channels 8 Width 16 bit Max Bandwidth 31.79 GiB/s 32,552.96 MiB/s 34.134 GB/s 34,134.253 MB/s 0.031 TiB/s 0.0341 TB/s Bandwidth Single 7.95 GiB/s Double 15.89 GiB/s Quad 31.79 GiB/s

DSP

This chip features Qualcomm's Hexagon 685 DSP.

Graphics

[Edit/Modify IGP Info]

	Integrated Graphics Information
	GPU Adreno 640 GPU Designer Qualcomm Max Displays 2 Frequency 250 MHz 0.25 GHz 250,000 KHz Burst Frequency 600 MHz 0.6 GHz 600,000 KHz Standards DirectX 12 OpenCL 2.0 OpenGL ES 3.2 Vulkan 1.1

• Codec: H.265 (HEVC), H.264 (AVC), HDR10, HDR10+, HLG, VP8, VP9
• HDR Playback Codec support for HDR10+, HDR10, HLG and Dolby Vision
• Volumetric VR video playback
• 8K 360 VR video playback

Camera

• ISP
  • Qualcomm Spectra 380 image signal processor
    • Dual 14-bit CV-ISPs
    • Hardware accelerator for computer vision (CV-ISP)
  • Up to 20 MP dual camera
  • Up to 48 MP single camera

• Photo Capture: HEIF photo capture
• Video Capture:
  • Rec. 2020 color gamut video capture
  • Up to 10-bit color depth video capture
  • Slow motion video capture up to 720p at 480fps,HEVC Video Capture

Connectivity

• X24 LTE modem
  • LTE Category 20
  • Downlink:
    • 2 Gbps peak
    • 7x20 MHz carrier aggregation
    • Up to 256-QAM
    • Up to 4x4 MIMO on five carriers
    • Full-Dimension MIMO (FD-MIMO)
    • Maximum 20 spatial streams
  • Uplink:
    • 316 Mbps peak
    • 3x20 MHz carrier aggregation
    • Up to 2x 106Mbps LTE streams
    • Up to 256-QAM
    • Uplink data compression
• LTE FDD, LTE TDD including CBRS support, LAA, LTE Broadcast, WCDMA (DB-DC-HSDPA, DC-HSUPA), TD-SCDMA, CDMA 1x, EV-DO, GSM/EDGE

• WiFi
  • Standards: 802.11ax, 802.11ac Wave 2, 802.11a/b/g, 802.11n
  • Spectral Bands: 2.4 GHz, 5 GHz, 6 GHz

• Bluetooth
  • Bluetooth 5.0
  • 2 Mbps

Location

• Systems: GPS, GLONASS, Beidou, Galileo, QZSS, SBAS, Dual frequency GNSS

Utilizing devices

• Asus RoG Phone 2
• Asus Zenfone 6Z
• Blackshark 2 SKywalker
• Galaxy Note 10
• LG G8 ThinQ
• LG V50 ThinQ
• OnePlus 7
• OnePlus 7 Pro
• OPPO Reno
• Samsung Galaxy S10
• Samsung Galaxy S10e
• Sony Xperia 1
• Xiaomi Mi 9
• Xiaomi Mi 9T Pro
• Xiaomi Mi MIX 3
• Xiaomi Redmi K20 Pro
• ZTE Axon 10 Pro
• ZTE Nubia Red Magic 3

This list is incomplete; you can help by expanding it.

Documents

• Product Brief
• Entertainment Deep Dive Presentation
• Deep Dive Presentation

Bibliography

• Techinsights "Lenovo Brings the New Snapdragon to Market"
• WikiChip Fuse "TSMC 7nm HD and HP Cells, 2nd Gen 7nm, And The Snapdragon 855 DTCO"