Raspberry Pi 4 B (Broadcom BCM2711) vs Qualcomm Snapdragon 821. Specifications, performance, tests

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

• Segment
  Desktop / Server Mobile
• Family
  Broadcom BCM Qualcomm Snapdragon
• Generation
  4 3
• CPU group
  Broadcom BCM2711 Qualcomm Snapdragon 820

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
  1.50 GHz 1.60 GHz
• Turbo (1 Core)
  No turbo 2.40 GHz
• Turbo (4 Cores)
  No turbo 2.40 GHz
• Hyperthreading
  No No
• Overclocking
  Yes No
• Core architecture
  normal hybrid (big.LITTLE)

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
  Broadcom VideoCore VI Qualcomm Adreno 530
• GPU frequency
  0.50 GHz 0.62 GHz
• GPU (Turbo)
  No turbo 0.62 GHz
• Execution units
  4 0
• Shader
  64 256
• Max. GPU Memory
  2 GB --
• Max. displays
  2 0
• Generation
  6 5
• Technology
  28 nm 14 nm
• Release date
  06/2019 Q4/2015

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

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

Types, channel quantity of RAM supported by Qualcomm Snapdragon 821 and Raspberry Pi 4 B (Broadcom BCM2711). Depending on the motherboards, higher or lower memory frequencies may be supported.

• Memory type
  LPDDR4-1866
• Max. Memory
  8192 GB
• ECC
  No No
• Memory channels
  1 4

Compare the TDP requirements of TDP Raspberry Pi 4 B (Broadcom BCM2711) and Qualcomm Snapdragon 821 to select a cooling system. Note, the TDP value refers to thermal watts, not electrical watts.

• TDP (PL1)
  7.5 W
• TDP down
  3 W --

Architecture, interfaces, additional instructions supported by Raspberry Pi 4 B (Broadcom BCM2711) and Raspberry Pi 4 B (Broadcom BCM2711), virtual machine technologies and process technology.

• Instruction set (ISA)
  x86-64 (64 bit) ARMv8-A64 (64 bit)
• Virtualization
  None None
• L2-Cache
  1.00 MB --
• Architecture
  Cortex-A72 Kryo
• Technology
  28 nm 14 nm
• Socket
  N/A N/A
• Release date
  06/2019 Q3/2016
• Part Number
  -- MSM8996 Pro-AB