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

Comprehensive background on the processors being compared, detailing their series, generation, and targeted market segment.

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

Essential parameters including the number of cores, threads, base and turbo frequencies, and cache size. These metrics provide insight into the processor’s speed—higher values generally indicate better performance.

• 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 --

The integrated graphics (iGPU) do not influence the CPU performance significantly; they serve as a substitute for a dedicated graphics card in the absence of one or are utilized in 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

This section details the built-in codecs used for encoding and decoding media content, which significantly enhance processing speed and efficiency.

• 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

Overview of the types and quantities of RAM supported by HiSilicon Kirin 620 and HiSilicon Kirin 955. The supported memory frequencies may vary depending on the motherboard configuration.

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

• AES-NI
  No No

Analyze the TDP (Thermal Design Power) requirements of HiSilicon Kirin 955 and HiSilicon Kirin 620 to make an informed decision on the appropriate cooling system. Remember that TDP refers to thermal watts, not electrical watts.

Information on architecture, interfaces, and additional instructions supported by HiSilicon Kirin 955 and HiSilicon Kirin 620, including virtual machine technologies and fabrication processes.

• 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