AMD Ryzen 7 7840HS vs AMD Ryzen 9 7900X3D. Specifications, performance, tests

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

• CPU group
  AMD Ryzen 7040 AMD Ryzen 7000
• Family
  Ryzen Ryzen
• Form Factor
  Laptops / Desktops Desktops / Boxed Processor
• Generation
  6 6
• Segment
  Mobile Desktop
• Series
  Ryzen 7000 Series Ryzen 7000 Series

Core counts, threads, cache and clock modes describe the CPU configuration. Performance depends on the workload and comparable measured results.

• Base Frequency
  3.8 GHz 4.4 GHz
• Core architecture
  normal normal
• Core Configuration
  8x Zen 4 12x
• CPU Cores
  8 12
• CPU Threads
  16 24
• Hyperthreading / SMT
  Yes Yes
• Max. Boost Clock
  5.1 GHz 5.6 GHz
• Overclocking
  No Yes
• Turbo Frequency (1 Core)
  5.1 GHz 5.6 GHz
• Turbo Frequency (12 Cores)
  - 5.4 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.

• DirectX Version
  12 12
• Execution units
  12 2
• Generation
  10 9
• GPU Frequency
  2700 MHz 2200 MHz
• GPU name
  AMD Radeon 780M AMD Radeon Graphics
• GPU Turbo
  2700 MHz 2200 MHz
• Graphics Cores
  12 2
• Max. displays
  4 3
• Max. GPU Memory
  32 GB 8 GB
• Release date
  Q1/2023 Q3/2022
• Shader
  768 128
• Technology
  4 nm 5 nm

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

• AV1
  Decode / Encode No
• H.264 / AVC
  Conflicting source values: Decode | Decode / Encode Decode / Encode
• h265 / HEVC (8 bit)
  Decode / Encode Decode / Encode
• h265 / HEVC (10 bit)
  Decode / Encode Decode / Encode
• JPEG
  Decode / Encode Decode / Encode
• VC-1
  Decode Decode
• VP8
  Decode Decode / Encode
• VP9
  Decode Decode / Encode

Types, channel quantity of RAM supported by AMD Ryzen 9 7900X3D and AMD Ryzen 7 7840HS. Depending on the motherboards, higher or lower memory frequencies may be supported.

• ECC
  Yes Yes
• Max. Memory
  256 GB 128 GB
• Memory Bandwidth
  89.6 GB/s 83.2 GB/s
• Memory channels
  2 2
• Memory type
  DDR5 (FP7r2) / LPDDR5X (FP7-FP8) DDR5
• PCIe
  PCIe 4.0 PCIe 5.0

• AES-NI
  Yes Yes

Compare the TDP requirements of TDP AMD Ryzen 7 7840HS and AMD Ryzen 9 7900X3D Power specifications describe different manufacturer limits. TDP, base power and maximum turbo power are separate values; they do not establish measured system consumption.

• Configurable TDP
  35-54 W -
• Default TDP
  35-54 W 120 W
• Maximum Operating Temperature
  100 °C 89 °C
• TDP (PL1 / PBP, legacy combined label)
  54 W -
• TDP (PL2)
  - 230 W
• TDP down
  35 W -
• TDP (PL1, legacy label)
  - 170 W

Architecture, interfaces, additional instructions supported by AMD Ryzen 7 7840HS and AMD Ryzen 9 7900X3D, virtual machine technologies and process technology.

• Architecture
  Phoenix (Zen 4) Raphael (Zen 4)
• Chip design
  Monolithic Chiplet
• Codename
  Phoenix Raphael AM5
• Documents
  Technical data sheet -
• 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,FMA3, AVX2, AVX512
• L2-Cache
  8 MB 12 MB
• L3-Cache
  16 MB 128 MB
• Operating systems
  Windows 10, Windows 11, Linux Windows 10, Windows 11, Linux
• Part Number
  100-000001129 -
• Release date
  Q4/2023 2023-02-28
• Socket
  FP7 / FP7r2 / FP8 AM5
• Technology
  TSMC 4nm FinFET TSMC 5nm FinFET
• Virtualization
  AMD-V, SVM AMD-V, SVM