AMD Ryzen 9 3900 vs AMD Ryzen 7 5700U. Specifications, performance, tests

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

• Segment
  Desktop / Server Mobile
• Family
  AMD Ryzen AMD Ryzen
• Generation
  3 4
• CPU group
  AMD Ryzen 3000 AMD Ryzen 5000U
• Successor
  AMD Ryzen 9 5900 --

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
  3.10 GHz 1.80 GHz
• CPU Cores
  12 8
• Turbo (1 Core)
  4.30 GHz 4.30 GHz
• CPU Threads
  24 16
• Hyperthreading
  Yes Yes
• Overclocking
  Yes No
• Core architecture
  normal normal

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
  no iGPU AMD Radeon 8 Graphics (Renoir)
• GPU frequency
  1.90 GHz
• GPU (Turbo)
  No turbo No turbo
• Execution units
  8
• Shader
  512
• Max. GPU Memory
  -- 2 GB
• Max. displays
  3
• Generation
  9
• DirectX Version
  12
• Technology
  7 nm
• Release date
  Q1/2020

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

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

Types, channel quantity of RAM supported by AMD Ryzen 7 5700U and AMD Ryzen 9 3900. Depending on the motherboards, higher or lower memory frequencies may be supported.

• Memory type
  DDR4-3200 DDR4-3200
• Max. Memory
  128 GB 32 GB
• ECC
  No Yes
• Memory channels
  2 2
• PCIe version
  4.0 3.0
• PCIe lanes
  20 12

• AES-NI
  Yes Yes

Compare the TDP requirements of TDP AMD Ryzen 9 3900 and AMD Ryzen 7 5700U to select a cooling system. Note, the TDP value refers to thermal watts, not electrical watts.

• TDP (PL1)
  65 W 15 W
• TDP up
  -- 25 W
• TDP down
  -- 10 W
• Tjunction max.
  95 °C 105 °C

Architecture, interfaces, additional instructions supported by AMD Ryzen 9 3900 and AMD Ryzen 9 3900, virtual machine technologies and process technology.

• Instruction set (ISA)
  x86-64 (64 bit) x86-64 (64 bit)
• Virtualization
  AMD-V, SVM AMD-V, SVM
• ISA extensions
  SSE4a, SSE4.1, SSE4.2, AVX2, FMA3 SSE4a, SSE4.1, SSE4.2, AVX2, FMA3
• L3-Cache
  64.00 MB 8.00 MB
• Architecture
  Matisse (Zen 2) Lucienne (Zen 2)
• Technology
  7 nm 7 nm
• Socket
  AM4 FP6
• Release date
  Q3/2019 Q1/2021