AMD Athlon II X4 641 vs AMD Athlon II X4 651. Specifications, performance, tests

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

• Family
  AMD Athlon II AMD Athlon II
• CPU group
  AMD Athlon II X4 (Llano) AMD Athlon II X4 (Llano)
• Segment
  Desktop / Server Desktop / Server
• Generation
  2 2

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.

• CPU Cores / Threads
  4 / 4 4 / 4
• Core architecture
  normal normal
• Cores
  4x 4x
• Hyperthreading / SMT
  No No
• Overclocking
  No No
• Frequency
  2.80 GHz 3.00 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
  no iGPU no iGPU
• GPU (Turbo)
  No turbo No turbo

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

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

Types, channel quantity of RAM supported by AMD Athlon II X4 651 and AMD Athlon II X4 641. Depending on the motherboards, higher or lower memory frequencies may be supported.

• Memory type
  DDR3-1333 DDR3-1333
• Max. Memory
  16 GB 16 GB
• Memory channels
  2 2
• Bandwidth
  21.3 GB/s 21.3 GB/s
• ECC
  No No
• PCIe
  2.0 2.0
• AES-NI
  No No

Compare the TDP requirements of TDP AMD Athlon II X4 641 and AMD Athlon II X4 651 to select a cooling system. Note, the TDP value refers to thermal watts, not electrical watts.

• TDP (PL1)
  100 W 100 W

Architecture, interfaces, additional instructions supported by AMD Athlon II X4 641 and AMD Athlon II X4 641, virtual machine technologies and process technology.

• Instruction set (ISA)
  x86-64 (64 bit) x86-64 (64 bit)
• ISA extensions
  MMX, 3DNow!, SSE3, SSE4a MMX, 3DNow!, SSE3, SSE4a
• L2-Cache
  4.00 MB 4.00 MB
• Architecture
  Llano Llano
• Technology
  32 nm 32 nm
• Virtualization
  AMD-V AMD-V
• Socket
  FM1 FM1
• Release date
  Q1/2012 Q4/2011
• Part Number
  AD638XOJGXBOX --