Intel Core i7-6660U vs Intel Core i7-6700. Specifications, performance, tests

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

• Segment
  Mobile Desktop / Server
• Family
  Intel Core i7 Intel Core i7
• Generation
  6 6
• CPU group
  Intel Core i 6000U Intel Core i 6000
• Successor
  -- Intel Core i7-7700

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
  2.40 GHz 3.40 GHz
• CPU Cores
  2 4
• Turbo (1 Core)
  3.40 GHz 4.00 GHz
• CPU Threads
  4 8
• Hyperthreading
  Yes Yes
• Overclocking
  No No
• 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 Iris Graphics 540 Intel HD Graphics 530
• GPU frequency
  0.30 GHz 0.35 GHz
• GPU (Turbo)
  1.05 GHz 1.15 GHz
• Execution units
  48 24
• Shader
  384 192
• Max. GPU Memory
  32 GB 64 GB
• Max. displays
  3 3
• Generation
  9 9
• DirectX Version
  12 12
• Technology
  14 nm 14 nm
• Release date
  Q3/2015 Q3/2015

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

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

Types, channel quantity of RAM supported by Intel Core i7-6700 and Intel Core i7-6660U. Depending on the motherboards, higher or lower memory frequencies may be supported.

• Memory type
  DDR3L-1600 SO-DIMMDDR4-2133 SO-DIMMLPDDR3-1866
• Max. Memory
  32 GB 64 GB
• ECC
  No No
• Memory channels
  2 2
• PCIe version
  3.0 3.0
• PCIe lanes
  12 16

• AES-NI
  Yes Yes

Compare the TDP requirements of TDP Intel Core i7-6660U and Intel Core i7-6700 to select a cooling system. Note, the TDP value refers to thermal watts, not electrical watts.

• TDP (PL1)
  15 W 65 W
• TDP down
  9.5 W --
• Tjunction max.
  100 °C --

Architecture, interfaces, additional instructions supported by Intel Core i7-6660U and Intel Core i7-6660U, 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
• ISA extensions
  SSE4.1, SSE4.2, AVX2 SSE4.1, SSE4.2, AVX2
• L3-Cache
  4.00 MB 8.00 MB
• Architecture
  Skylake U Skylake S
• Technology
  14 nm 14 nm
• Socket
  BGA 1356 LGA 1151
• Release date
  Q1/2016 Q3/2015