Snapdragon 821 vs Snapdragon 665

We compared the 4-core Qualcomm Snapdragon 821 (Adreno 530) with the newer 8-core Snapdragon 665 (Adreno 610) SoC. Here you will find the pros and cons of each chip, technical specs, and comprehensive tests in benchmarks, like AnTuTu and Geekbench.

Review

General comparison of performance, power consumption, and other indicators
CPU Performance
Single and multi-core processor tests
Gaming Performance
GPU performance in games and OpenCL/Vulcan
Battery life
Efficiency of battery consumption
NanoReview Score
Overall chip score

Key Differences

Main differences and advantages of each chip
Pros of Qualcomm Snapdragon 821
  • Supports 100% higher memory bandwidth (29.8 against 14.9 GB/s)
  • Performs 90% better in floating-point computations
  • Shows better (up to 26%) AnTuTu 9 score – 247K vs 196K
  • 17% higher CPU clock speed (2342 vs 2000 MHz)
  • Higher GPU frequency (~9%)
Pros of Qualcomm Snapdragon 665
  • Has 4 more cores
  • Announced 2-years and 8-months later
  • Has a smaller size transistor (11 versus 14 nm)

Benchmarks

Performance tests in popular benchmarks

AnTuTu 9

The AnTuTu Benchmark measures CPU, GPU, RAM, and I/O performance in different scenarios
247696
CPU 62991 66445
GPU 90961 34275
Memory 36699 38991
UX 55683 55823
Total score 247696 196478

GeekBench 5

The GeekBench test shows raw single-threaded and multithreaded CPU performance
Single-Core Score
Multi-Core Score
Image compression 51.2 Mpixels/s 87.65 Mpixels/s
Face detection 7.96 images/s 12.2 images/s
Speech recognition 15.4 words/s 21.45 words/s
Machine learning 14 images/s 16.65 images/s
Camera shooting 10.7 images/s 10.9 images/s
HTML 5 0.71 Mnodes/s 1.8 Mnodes/s
SQLite 239.7 Krows/s 468 Krows/s

Gaming

Table of average FPS and graphics settings in mobile games
PUBG Mobile - 29 FPS
[Low]
Call of Duty: Mobile - 28 FPS
[Ultra]
Fortnite - 27 FPS
[Low]
Shadowgun Legends - 53 FPS
[Low]
World of Tanks Blitz - 57 FPS
[Medium]
Mobile Legends: Bang Bang - 30 FPS
[High]
Device - Xiaomi Redmi Note 8T
1080 x 2340
We provide average results. FPS may differ, depending on game version, OS and other factors.

Specifications

Full list of technical specifications of Snapdragon 821 and Snapdragon 665

CPU

Architecture 2x 2.342 GHz – Kryo
2x 1.6 GHz – Kryo
4x 2 GHz – Kryo 260 Gold (Cortex-A73)
4x 1.8 GHz – Kryo 260 Silver (Cortex-A53)
Cores 4 8
Frequency 2342 MHz 2000 MHz
Instruction set ARMv8-A ARMv8-A
L1 cache 64 KB -
L2 cache 3 MB 1 MB
Process 14 nanometers 11 nanometers
Transistor count 2 billion -
TDP 11 W 5 W

Graphics

GPU name Adreno 530 Adreno 610
Architecture Adreno 500 Adreno 600
GPU frequency 653 MHz 600 MHz
Execution units 2 2
Shading units 256 96
FLOPS 519 Gigaflops 273 Gigaflops
Vulkan version 1.0 1.1
OpenCL version 2.0 2.0
DirectX version 11.2 12

Memory

Memory type LPDDR4 LPDDR4X
Memory frequency 1866 MHz 1866 MHz
Bus 4x 16 Bit 2x 16 Bit
Max bandwidth 29.8 Gbit/s 14.9 Gbit/s
Max size 6 GB 8 GB

Multimedia (ISP)

Neural processor (NPU) Hexagon 680 Hexagon 686
Storage type eMMC 5.1, UFS 2.0 eMMC 5.1, UFS 2.1
Max display resolution 3840 x 2160 2520 x 1080
Max camera resolution 1x 28MP, 2x 13MP 1x 48MP, 2x 16MP
Video capture 4K at 30FPS 4K at 30FPS
Video playback 4K at 30FPS 4K at 30FPS
Video codecs H.264, H.265, VP8, VP9 H.264, H.265, VP8, VP9
Audio codecs AIFF, CAF, MP3, MP4, WAV AIFF, CAF, MP3, MP4, WAV

Connectivity

Modem X12 X12
4G support LTE Cat. 12 LTE Cat. 12
5G support No No
Download speed Up to 600 Mbps Up to 600 Mbps
Upload speed Up to 150 Mbps Up to 150 Mbps
Wi-Fi 5 5
Bluetooth 4.1 5.0
Navigation GPS, GLONASS, Beidou, Galileo GPS, GLONASS, Beidou, Galileo, QZSS, SBAS

Info

Announced August 2016 April 2019
Class Flagship Mid range
Model number MSM8996 Pro SM6125
Official page Qualcomm Snapdragon 821 official site Qualcomm Snapdragon 665 official site

Cast your vote

So, which SoC would you choose?
100 (54.6%)
83 (45.4%)
Total votes: 183

Comments

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