Intel Core i7-3940XM vs Intel Core i7-3960X. Specifications, performance, tests

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

• Segment
  Mobile Desktop / Server
• Family
  Intel Core i7 Extreme Edition Intel Core i7 Extreme Edition
• Generation
  3 3
• CPU group
  Intel Core i 3000M Intel Core i 3000X

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.

• Frequency
  3.00 GHz 3.30 GHz
• CPU Cores
  4 6
• Turbo (1 Core)
  3.90 GHz 3.90 GHz
• CPU Threads
  8 12
• Hyperthreading
  Yes Yes
• Overclocking
  Yes Yes
• Core architecture
  normal normal

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
  Intel HD Graphics 4000 no iGPU
• GPU frequency
  0.65 GHz
• GPU (Turbo)
  1.35 GHz No turbo
• Execution units
  16
• Shader
  128
• Max. displays
  3
• Generation
  7
• DirectX Version
  11.0
• Technology
  22 nm
• Release date
  Q1/2011

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
  Decode / Encode No
• VP9
  No No
• VP8
  No No
• AV1
  No No
• AVC
  Decode / Encode No
• VC-1
  Decode No
• JPEG
  Decode No

Types, channel quantity of RAM supported by Intel Core i7-3960X and Intel Core i7-3940XM. Depending on the motherboards, higher or lower memory frequencies may be supported.

• Memory type
  DDR3-1333DDR3-1600DDR3L-1333 SO-DIMMDDR3L-1600 SO-DIMM DDR3-1600
• Max. Memory
  32 GB
• ECC
  No No
• Memory channels
  2 4
• PCIe version
  3.0
• PCIe lanes
  16

• AES-NI
  Yes Yes

Compare the TDP requirements of TDP Intel Core i7-3940XM and Intel Core i7-3960X to select a cooling system. Note, the TDP value refers to thermal watts, not electrical watts.

• TDP (PL1)
  55 W 130 W
• Tjunction max.
  105 °C --

Architecture, interfaces, additional instructions supported by Intel Core i7-3940XM and Intel Core i7-3940XM, virtual machine technologies and process technology.

• Instruction set (ISA)
  x86-64 (64 bit) x86-64 (64 bit)
• Virtualization
  VT-x, VT-x EPT, VT-d VT-x, VT-x EPT, VT-d (C2 Stepping)
• ISA extensions
  SSE4.1, SSE4.2, AVX SSE4.1, SSE4.2, AVX
• L3-Cache
  8.00 MB 15.00 MB
• Architecture
  Ivy Bridge H Sandy Bridge E
• Technology
  22 nm 32 nm
• Socket
  PGA 988 LGA 2011
• Release date
  Q3/2012 Q4/2011