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

Comprehensive background on the processors being compared, detailing their series, generation, and targeted 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

Essential parameters including the number of cores, threads, base and turbo frequencies, and cache size. These metrics provide insight into the processor’s speed—higher values generally indicate better performance.

• 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

The integrated graphics (iGPU) do not influence the CPU performance significantly; they serve as a substitute for a dedicated graphics card in the absence of one or are utilized in mobile devices.

• GPU name
  no iGPU no iGPU
• GPU (Turbo)
  No turbo No turbo

This section details the built-in codecs used for encoding and decoding media content, which significantly enhance processing speed and efficiency.

• 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

Overview of the types and quantities of RAM supported by AMD Athlon II X4 651 and AMD Athlon II X4 641. The supported memory frequencies may vary depending on the motherboard configuration.

• 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

Analyze the TDP (Thermal Design Power) requirements of AMD Athlon II X4 641 and AMD Athlon II X4 651 to make an informed decision on the appropriate cooling system. Remember that TDP refers to thermal watts, not electrical watts.

• TDP (PL1)
  100 W 100 W

Information on architecture, interfaces, and additional instructions supported by AMD Athlon II X4 641 and AMD Athlon II X4 651, including virtual machine technologies and fabrication processes.

• 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 --