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Snapdragon 845 - Qualcomm
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Snapdragon 845
sdm845 (front).png
Chip package, front
General Info
DesignerQualcomm,
ARM Holdings
ManufacturerSamsung
Model NumberSDM845
Part NumberSDM845
IntroductionDecember 6, 2017 (announced)
February, 2018 (launched)
General Specs
FamilySnapdragon 800
Series800
Frequency2,800 MHz, 1,700 MHz
Microarchitecture
ISAARMv8.2 (ARM)
MicroarchitectureCortex-A75, Cortex-A55
Core NameKryo 385 Gold, Kryo 385 Silver
Process10 nm
Transistors5,300,000,000
TechnologyCMOS
Die95 mm²
Word Size64 bit
Cores8
Threads8
Max CPUs1 (Uniprocessor)
Max Memory8 GiB
Packaging
sdm845 (back).png
Succession
Block diagram

Snapdragon 845 is a high-performance 64-bit ARM LTE system on a chip designed by Qualcomm and introduced in late 2017. Fabricated on Samsung's 10nm 10LPP, the 845 features four Kryo 385 Silver high-efficiency cores operating at 1.7 GHz along with four high-performance Kryo 385 Gold cores operating at 2.8 GHz. The Snapdragon 845 integrates the Adreno 630 GPU operation at ? MHz and features an X20 LTE modem supporting Cat 13 uplink and Cat 18 downlink. This chip supports up to 8 GiB of quad-channel LPDDR4X-3733 memory.

Cache[edit]

Main articles: Cortex-A75 § Cache and Cortex-A55 § Cache


Quad-core cluster Cortex-A75:

[Edit/Modify Cache Info]

hierarchy icon.svg
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
0.5 MiB
524,288 B
4.882812e-4 GiB
L1I$256 KiB
0.25 MiB
262,144 B
2.441406e-4 GiB
4x64 KiB4-way set associative 
L1D$256 KiB
0.25 MiB
262,144 B
2.441406e-4 GiB
4x64 KiB4-way set associative 

L2$1 MiB
1,024 KiB
1,048,576 B
9.765625e-4 GiB
  4x256 KiB8-way set associative 

Quad-core cluster Cortex-A55:

[Edit/Modify Cache Info]

hierarchy icon.svg
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
0.5 MiB
524,288 B
4.882812e-4 GiB
L1I$256 KiB
0.25 MiB
262,144 B
2.441406e-4 GiB
4x64 KiB2-way set associative 
L1D$256 KiB
0.25 MiB
262,144 B
2.441406e-4 GiB
4x64 KiB4-way set associative 

L2$512 KiB
0.5 MiB
524,288 B
4.882812e-4 GiB
  4x128 KiB8-way set associative 
  • 2 MiB L3

Memory controller[edit]

[Edit/Modify Memory Info]

ram icons.svg
Integrated Memory Controller
Max TypeLPDDR4X-3833
Supports ECCNo
Max Mem8 GiB
Frequency1866 MHz
Controllers1
Channels4
Width16 bit
Max Bandwidth29.87 GiB/s
Bandwidth
Single 7.47 GiB/s
Double 14.93 GiB/s
Quad 29.87 GiB/s

DSP[edit]

This chip features Qualcomm's Hexagon 685 DSP.

Graphics[edit]

[Edit/Modify IGP Info]

screen icon.svg
Integrated Graphics Information
GPUAdreno 630 GPU
DesignerQualcomm
Max Displays2
Output

Standards
DirectX12
OpenCL2.0
OpenGL ES3.2
Vulkan1.0
  • UHD video playback/encoding @ 4K (3840x2160) 60fps, 10bit HDR, Rec 2020 color gamut
  • Slow motion HEVC video encoding of either HD (720p) video up to 480fps or FHD (1080p) up to 240fps
  • H.264 (AVC), H.265 (HEVC), VP9, DisplayPort over USB Type-C support

Audio[edit]

  • Qualcomm Aqstic audio codec and speaker amplifier
  • Qualcomm aptX audio playback with support for aptX Classic and HD
  • Native DSD support, PCM up to 384kHz/32bit

Camera[edit]

  • Image Signal Processor
    • Qualcomm Spectra 280
    • New architecture for 14-bit image signal processing, with support for up to:
      • Single HFR 16 MPix camera at 60fps ZSL
      • Dual 16 MPix cameras at 30fps ZSL
      • Single 32 MPix camera at 30fps ZSL
    • Can connect up to 7 different cameras (many configurations possible)
      • Multi-frame Noise Reduction (MFNR) with accelerated image stabilization
      • Hybrid Autofocus with support for dual phase detection (2PD) sensors
      • Ultra HD Premium video capture @ 4K (3840x2160) 60fps, 10bit HDR, Rec 2020 color gamut
      • Higher quality video capture with Motion Compensated Temporal Filtering (MCTF)
      • 3D structured light active depth sensing, with accelerated face detection/recognition

Connectivity[edit]

  • X20 LTE Modem
    • Downlink:
      • LTE Cat 18 up to 1.2 Gbps, 5x20 MHz carrier aggregation, up to 256-QAM, up to 4x4 MIMO on three carriers
    • Uplink:
      • LTE Cat 13 up to 150 Mbps, Upload+ (2x20 MHz carrier aggregation, up to 64-QAM)
    • License Assisted Access (LAA)
    • Citizens Broadband Radio Service (CBRS) shared radio spectrum
    • Dual SIM Dual VoLTE (DSDV)
    • All Mode with support for all major cellular modes plus LAA.
      • VoLTE with SRVCC to 3G and 2G, HD and Ultra HD Voice (EVS), CSFB to 3G and 2G
      • Voice over Wi-Fi (VoWiFi) with LTE call continuity
  • Wi-Fi
    • 802.11ad Multi-gigabit with 60 GHz diversity module
    • 802.11ac 2x2 with MU-MIMO
    • Tri-band Wi-Fi: 2.4 GHz and 5 GHz with Dual-Band Simultaneous (DBS) + 60 GHz
    • 11k/r/v: Enhanced mobility, fast acquisition and congestion mitigation for Carrier Wi-Fi
  • Bluetooth
    • Bluetooth 5.0
      • Proprietary enhancements
        • Ultra-low power wireless earbuds
        • Direct audio broadcast to multiple devices

Location[edit]

  • Systems: GPS, Glonass, BeiDou, Galileo, QZSS, and SBAS
  • Low Power Geofencing and Tracking, Sensor-assisted Navigation

Utilizing devices[edit]

  • Oppo Find X
  • Asus Zenfone 5Z
  • Google Pixel 3
  • Google Pixel 3 XL
  • HTC U12+
  • LG G7 ThinQ
  • LG V35 ThinQ
  • LG V40 ThinQ
  • OnePlus 6
  • OnePlus 6T
  • Samsung Galaxy Note9
  • Samsung Galaxy S9
  • Samsung Galaxy S9+
  • Sony Xperia XZ2
  • Sony Xperia XZ3
  • PocoPhone f1
  • Xiaomi Mi 8
  • ZTE Axon 9 Pro

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

Documents[edit]

back imageFile:sdm845 (back).png +
base frequency2,800 MHz (2.8 GHz, 2,800,000 kHz) + and 1,700 MHz (1.7 GHz, 1,700,000 kHz) +
core count8 +
core nameKryo 385 Gold + and Kryo 385 Silver +
designerQualcomm + and ARM Holdings +
die area95 mm² (0.147 in², 0.95 cm², 95,000,000 µm²) +
dspHexagon 685 DSP +
familySnapdragon 800 +
first announcedDecember 6, 2017 +
first launchedFebruary 2018 +
full page namequalcomm/snapdragon 800/845 +
has ecc memory supportfalse +
instance ofmicroprocessor +
integrated gpuAdreno 630 GPU +
integrated gpu designerQualcomm +
isaARMv8.2 +
isa familyARM +
l1$ size0.5 MiB (512 KiB, 524,288 B, 4.882812e-4 GiB) +
l1d$ description4-way set associative +
l1d$ size0.25 MiB (256 KiB, 262,144 B, 2.441406e-4 GiB) +
l1i$ description4-way set associative + and 2-way set associative +
l1i$ size0.25 MiB (256 KiB, 262,144 B, 2.441406e-4 GiB) +
l2$ description8-way set associative +
l2$ size1 MiB (1,024 KiB, 1,048,576 B, 9.765625e-4 GiB) + and 0.5 MiB (512 KiB, 524,288 B, 4.882812e-4 GiB) +
ldateFebruary 2018 +
main imageFile:sdm845 (front).png +
main image captionChip package, front +
manufacturerSamsung +
max cpu count1 +
max memory8,192 MiB (8,388,608 KiB, 8,589,934,592 B, 8 GiB, 0.00781 TiB) +
max memory channels4 +
microarchitectureCortex-A75 + and Cortex-A55 +
model numberSDM845 +
nameSnapdragon 845 +
part numberSDM845 +
process10 nm (0.01 μm, 1.0e-5 mm) +
series800 +
supported memory typeLPDDR4X-3833 +
technologyCMOS +
thread count8 +
transistor count5,300,000,000 +
used byOppo Find X +, Asus Zenfone 5Z +, Google Pixel 3 +, Google Pixel 3 XL +, HTC U12+ +, LG G7 ThinQ +, LG V35 ThinQ +, LG V40 ThinQ +, OnePlus 6 +, OnePlus 6T +, Samsung Galaxy Note9 +, Samsung Galaxy S9 +, Samsung Galaxy S9+ +, Sony Xperia XZ2 +, Sony Xperia XZ3 +, PocoPhone f1 +, Xiaomi Mi 8 + and ZTE Axon 9 Pro +
word size64 bit (8 octets, 16 nibbles) +