AMD A4-4020 vs AMD Athlon II X4 638

Let's find out which one of AMD A4-4020 and AMD Athlon II X4 638 is of a more recent generation, and what segment it belongs to.

• Name
  AMD A4-4020 AMD Athlon II X4 638
• Segment
  Desktop / Server Desktop / Server
• Family
  AMD A AMD Athlon II
• Generation
  2 2
• CPU group
  AMD A4-4000 AMD Athlon II X4 (Llano)

In this block we are going to compare AMD A4-4020 vs AMD Athlon II X4 638 by main technical specifications: number of cores and threads, base and maximum frequencies, process technology and cache size. The higher these specifications are, the more powerful your CPU will be.

• Frequency
  3.20 GHz 2.70 GHz
• Overclocking
  Yes No
• Core architecture
  normal normal

Common specifications for integrated graphics cards in AMD A4-4020 and AMD Athlon II X4 638 along with supported interfaces and connection options. This block has no effect on the final efficiency of the CPU.

• GPU name
  AMD Radeon HD 7480D no iGPU
• GPU frequency
  0.72 GHz
• GPU (Turbo)
  No turbo No turbo
• Execution units
  2
• Shader
  128
• Max. GPU Memory
  2 GB --
• Max. displays
  2
• Generation
  4
• Technology
  32 nm
• Release date
  Q2/2012

Let's compare the support of video codecs between AMD A4-4020 and AMD Athlon II X4 638. Hardware support of video decoding by embedded graphics cards directly affects the speed and quality of rendering videos.

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

To choose the best model between AMD A4-4020 and AMD Athlon II X4 638 you need to pay special attention to memory type, clock frequency, multi-channel features, and PCIe version. The higher these numbers are, the better your CPU will be. Keep in mind that the maximum memory and frequency may also depend on the model of the motherboard.

• Memory type
  DDR3-1333 DDR3-1333
• Max. Memory
  16 GB
• ECC
  No No
• Memory channels
  2 2 (Dual Channel)

Let's find out what TDP value would be better for AMD A4-4020 or AMD Athlon II X4 638? The Thermal Design Power (TDP) indicates the maximum amount of heat that should be dissipated by the chip cooling system. However, the value of TDP gives only a rough indication of the real power consumption of the CPU.

• TDP (PL1)
  65 W 65 W

Here you can find a comparison of 2nd and 3rd level cache sizes for AMD A4-4020 and AMD Athlon II X4 638 CPUs along with a list of ISA extensions.

• Instruction set (ISA)
  x86-64 (64 bit) x86-64 (64 bit)
• Virtualization
  AMD-V AMD-V
• ISA extensions
  SSE4a, SSE4.1, SSE4.2, AVX, FMA3, FMA4 MMX, 3DNow!, SSE3, SSE4a
• L2-Cache
  -- 4.00 MB
• L3-Cache
  1.00 MB --
• Architecture
  Richland (Piledriver) Llano
• Technology
  32 nm 32 nm
• Socket
  FM2 FM1
• Release date
  Q1/2014 Q1/2012
• Part Number
  -- AD638XOJGXBOX