AMD Ryzen 9 7940HS vs AMD Epyc 7551. Specifications, performance, tests

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

• Family
  AMD Ryzen 9 AMD Epyc
• CPU group
  AMD Ryzen 7040 AMD Epyc 7001
• Segment
  Mobile Desktop / Server
• Generation
  6 1
• Successor
  -- AMD Epyc 7552

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.

• Core architecture
  normal normal
• Overclocking
  No No
• Frequency
  4.00 GHz 2.00 GHz

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
  AMD Radeon 780M Graphics no iGPU
• GPU frequency
  1.20 GHz
• GPU (Turbo)
  2.70 GHz No turbo
• Execution units
  12
• Shader
  768
• Max. GPU Memory
  32 GB --
• Max. displays
  4
• Generation
  10
• Technology
  4 nm
• Release date
  Q1/2023

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 / Encode No
• h264
  Decode / Encode No
• VP8
  Decode No
• VP9
  Decode No
• AV1
  Decode / Encode No
• AVC
  Decode No
• VC-1
  Decode No
• JPEG
  Decode / Encode No

Types, channel quantity of RAM supported by AMD Epyc 7551 and AMD Ryzen 9 7940HS. Depending on the motherboards, higher or lower memory frequencies may be supported.

• Memory type
  DDR5-5600LPDDR5X-7500 DDR4-2666
• Max. Memory
  256 GB
• Memory channels
  2 (Dual Channel) 8
• ECC
  Yes Yes

Compare the TDP requirements of TDP AMD Ryzen 9 7940HS and AMD Epyc 7551 to select a cooling system. Note, the TDP value refers to thermal watts, not electrical watts.

• TDP down
  35 W --
• Tjunction max.
  100 °C --

Architecture, interfaces, additional instructions supported by AMD Ryzen 9 7940HS and AMD Ryzen 9 7940HS, virtual machine technologies and process technology.

• Technology
  4 nm 14 nm
• Socket
  FP8 SP3
• L2-Cache
  8.00 MB --
• L3-Cache
  16.00 MB 64.00 MB
• Architecture
  Phoenix (Zen 4) Naples (Zen)
• Virtualization
  AMD-V, SVM AMD-V, SVM
• Instruction set (ISA)
  x86-64 (64 bit) x86-64 (64 bit)
• ISA extensions
  SSE4a, SSE4.1, SSE4.2,FMA3, AVX2, AVX512 SSE4a, SSE4.1, SSE4.2, AVX2, FMA3
• Release date
  Q1/2023 Q3/2017
• Part Number
  100-000001128 --