AMD A8-3870K vs AMD Athlon 300U. Specifications, performance, tests

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

• CPU group
  AMD A8-3000 AMD Athlon 300
• Family
  AMD A Athlon
• Generation
  1 6
• Segment
  Desktop / Server Mobile
• Form Factor
  - Laptops / Desktops
• Series
  - Athlon 300 Series

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

• Base Frequency
  3.1 GHz 2.4 GHz
• Core architecture
  normal normal
• CPU Cores
  4 2
• CPU Threads
  4 4
• Hyperthreading / SMT
  No Yes
• Overclocking
  Yes No
• Turbo Frequency (1 Core)
  No turbo 3.3 GHz
• Turbo Frequency (4 Cores)
  No turbo -
• Max. Boost Clock
  - 3.3 GHz
• Turbo Frequency (2 Cores)
  - 2.4 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
  11 12
• Execution units
  5 3
• Generation
  3 8
• GPU Frequency
  600 MHz 1000 MHz
• GPU name
  AMD Radeon HD 6550D Radeon Vega 3 Graphics
• GPU Turbo
  No turbo No turbo
• Max. displays
  2 3
• Max. GPU Memory
  1 GB 2 GB
• Release date
  Q2/2011 Q1/2018
• Shader
  400 192
• Technology
  32 nm 14 nm
• Graphics Cores
  - 3

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

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

Types, channel quantity of RAM supported by AMD Athlon 300U and AMD A8-3870K. Depending on the motherboards, higher or lower memory frequencies may be supported.

• ECC
  No Yes
• Max. Memory
  - 32 GB
• Memory channels
  2 2
• Memory type
  DDR3-1600 DDR4-2400
• PCIe lanes
  - 12
• PCIe version
  - 3.0
• System Memory Specification
  - 2400

• AES-NI
  No Yes

Compare the TDP requirements of TDP AMD A8-3870K and AMD Athlon 300U Power specifications describe different manufacturer limits. TDP, base power and maximum turbo power are separate values; they do not establish measured system consumption.

• Maximum Operating Temperature
  - 105 °C
• TDP (PL1, legacy label)
  100 W 15 W
• Default TDP
  - 15 W

Architecture, interfaces, additional instructions supported by AMD A8-3870K and AMD Athlon 300U, virtual machine technologies and process technology.

• Architecture
  Llano (K10) Picasso (Zen+)
• Instruction set (ISA)
  x86-64 (64 bit) x86-64 (64 bit)
• ISA extensions
  SSE3, SSE4a SSE4a, SSE4.1, SSE4.2, AVX2, FMA3
• L2-Cache
  - 1 MB
• L3-Cache
  4 MB 4 MB
• Release date
  Q4/2011 Q1/2019
• Socket
  FM1 FP5
• Technology
  32 nm 14nm
• Virtualization
  AMD-V AMD-V, SVM
• Codename
  - Picasso
• L1-Cache
  - 0.1875 MB
• Manufacturer product ID (tray)
  - YM300UC4T2OFG
• Official source
  - https://www.amd.com/en/products/specifications/processors.html
• Operating systems
  - Windows 11 - 64-Bit Edition / Windows 10 - 64-Bit Edition / RHEL x86 64-Bit / Ubuntu x86 64-Bit
• Verification scope
  - Explicit manufacturer fields refreshed; other original historical fields retained, not all reverified. Partial composite conflicts are preserved.
• Verified on
  - 2026-10-01