AMD FX-4300 vs AMD Athlon II X4 651. Specifications, performance, tests

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

• CPU group
  AMD FX-4300 AMD Athlon II X4 (Llano)
• Family
  FX-Series AMD Athlon II
• Form Factor
  Desktops -
• Generation
  2 2
• Segment
  Desktop / Server Desktop / Server
• Series
  FX 4-Core Black Edition Processors -

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 3 GHz
• Core architecture
  normal normal
• CPU Cores
  4 4
• CPU Threads
  4 4
• Hyperthreading / SMT
  No No
• Max. Boost Clock
  4 GHz -
• Overclocking
  Yes No
• Turbo Frequency (1 Core)
  No turbo -
• Turbo Frequency (4 Cores)
  No turbo -
• Core Configuration
  - 4x

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
  None no iGPU
• GPU Turbo
  No turbo No turbo

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

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

Types, channel quantity of RAM supported by AMD Athlon II X4 651 and AMD FX-4300. Depending on the motherboards, higher or lower memory frequencies may be supported.

• ECC
  Yes No
• Max. Memory
  - 16 GB
• Memory channels
  2 2
• Memory type
  DDR3 DDR3-1333
• System Memory Specification
  1866 -
• Memory Bandwidth
  - 21.3 GB/s
• PCIe
  - 2.0

• AES-NI
  Yes No

Compare the TDP requirements of TDP AMD FX-4300 and AMD Athlon II X4 651 Power specifications describe different manufacturer limits. TDP, base power and maximum turbo power are separate values; they do not establish measured system consumption.

• Default TDP
  95 W -
• Maximum Operating Temperature
  70.5 °C -
• TDP (PL1, legacy label)
  95 W 100 W

Architecture, interfaces, additional instructions supported by AMD FX-4300 and AMD Athlon II X4 651, virtual machine technologies and process technology.

• Architecture
  Vishera (Bulldozer) Llano
• Instruction set (ISA)
  x86-64 (64 bit) x86-64 (64 bit)
• ISA extensions
  SSE4.1, SSE4.2, AVX, FMA3, FMA4 MMX, 3DNow!, SSE3, SSE4a
• L1-Cache
  0.1875 MB -
• L2-Cache
  4 MB 4 MB
• L3-Cache
  4 MB -
• Manufacturer product ID (boxed)
  FD4300WMHKBOX -
• Manufacturer product ID (tray)
  FD4300WMW4MHK -
• Official source
  https://www.amd.com/en/products/specifications/processors.html -
• Release date
  Q4/2012 Q4/2011
• Socket
  AM3+ FM1
• Technology
  32nm SOI 32 nm
• Verification scope
  Explicit manufacturer fields refreshed; other original historical fields retained, not all reverified. Partial composite conflicts are preserved. -
• Verified on
  2026-10-01 -
• Virtualization
  AMD-V AMD-V