Qualcomm Snapdragon 821 vs Samsung Exynos 7904. Specifications, performance, tests

Background information about the processors being compared, series, generation and market segment.

• Family
  Qualcomm Snapdragon Samsung Exynos
• CPU group
  Qualcomm Snapdragon 820 Samsung Exynos 7872/7884/7885/7904
• Segment
  Mobile Mobile
• Generation
  3 2

Basic parameters such as number of cores, number of threads, base and turbo frequency, and cache size. These parameters indirectly tell about the speed of the processor, the higher they are the better.

• CPU Cores / Threads
  4 / 4 8 / 8
• Core architecture
  hybrid (big.LITTLE) hybrid (big.LITTLE)
• A-Core
  2x Kryo 2x Cortex-A73
• B-Core
  2x Kryo 6x Cortex-A53
• Frequency
  1.60 GHz 1.60 GHz
• Turbo (1 Core)
  2.40 GHz 1.80 GHz
• Hyperthreading
  No No
• Overclocking
  No No

Internal Graphics does not affect the performance of the CPU, performs the work of the graphics card in its absence or on mobile devices.

• GPU name
  Qualcomm Adreno 530 ARM Mali-G71 MP2
• GPU frequency
  0.62 GHz 0.77 GHz
• GPU (Turbo)
  0.62 GHz No turbo
• Execution units
  0 2
• Shader
  256 32
• Max. GPU Memory
  -- 2 GB
• Max. displays
  0 1
• Generation
  5 Bifrost 1
• Direct X
  11,1 11
• Technology
  14 nm 16 nm
• Release date
  Q4/2015 Q2/2016

Built-in codecs used to encode and decode content. Significantly speeds up the required operations.

• h265 / HEVC (8 bit)
  Decode Decode / Encode
• h265 / HEVC (10 bit)
  No Decode
• h264
  Decode Decode / Encode
• VP8
  Decode Decode / Encode
• VP9
  Decode No
• AV1
  No No
• AVC
  No Decode / Encode
• VC-1
  Decode No
• JPEG
  Decode Decode / Encode

Types, channel quantity of RAM supported by Samsung Exynos 7904 and Qualcomm Snapdragon 821. Depending on the motherboards, higher or lower memory frequencies may be supported.

• Memory type
  LPDDR4-1866 LPDDR4-1866
• Memory channels
  4 2
• ECC
  No No
• AES-NI
  No No

Compare the TDP requirements of TDP Qualcomm Snapdragon 821 and Samsung Exynos 7904 to select a cooling system. Note, the TDP value refers to thermal watts, not electrical watts.

Architecture, interfaces, additional instructions supported by Qualcomm Snapdragon 821 and Qualcomm Snapdragon 821, virtual machine technologies and process technology.

• Instruction set (ISA)
  ARMv8-A64 (64 bit) ARMv8-A64 (64 bit)
• Architecture
  Kryo Cortex-A73 / Cortex-A53
• Technology
  14 nm 14 nm
• Virtualization
  None None
• Socket
  N/A N/A
• Release date
  Q3/2016 Q1/2019
• Part Number
  MSM8996 Pro-AB --