HiSilicon Kirin 955 vs HiSilicon Kirin 620. Specifications, performance, tests

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

• Segment
  Mobile Mobile
• Family
  HiSilicon Kirin HiSilicon Kirin
• Generation
  4 3
• CPU group
  HiSilicon Kirin 950 HiSilicon Kirin 620

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.

• Frequency
  1.80 GHz 1.20 GHz
• CPU Cores
  8 4
• Turbo (1 Core)
  2.50 GHz 1.20 GHz
• CPU Threads
  8 4
• Hyperthreading
  No No
• Overclocking
  No No
• Core architecture
  hybrid (big.LITTLE) normal
• A core
  4x Cortex-A72 --
• B core
  4x Cortex-A53 --

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
  ARM Mali-T880 MP4 ARM Mali-450 MP4
• GPU frequency
  0.90 GHz 0.53 GHz
• GPU (Turbo)
  0.90 GHz 0.53 GHz
• Execution units
  4 4
• Shader
  64 64
• Max. displays
  2 1
• Generation
  Midgard 4 Utgard
• DirectX Version
  11 0
• Technology
  16 nm 28nm
• Release date
  Q2/2016 2012

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

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

Types, channel quantity of RAM supported by HiSilicon Kirin 620 and HiSilicon Kirin 955. Depending on the motherboards, higher or lower memory frequencies may be supported.

• Memory type
  LPDDR3LPDDR4 LPDDR3
• ECC
  No No
• Memory channels
  2 1

• AES-NI
  No No

Compare the TDP requirements of TDP HiSilicon Kirin 955 and HiSilicon Kirin 620 to select a cooling system. Note, the TDP value refers to thermal watts, not electrical watts.

Architecture, interfaces, additional instructions supported by HiSilicon Kirin 955 and HiSilicon Kirin 955, virtual machine technologies and process technology.

• Instruction set (ISA)
  ARMv8-A64 (64 bit) ARMv8-A64 (64 bit)
• Virtualization
  None None
• Architecture
  Cortex-A72 / Cortex-A53 Cortex-A53
• Technology
  16 nm 28 nm
• Socket
  N/A N/A
• Release date
  Q2/2016 Q1/2015