Intel Core i9-11900KB vs Intel Core i7-1255U. Specifications, performance, tests

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

• Segment
  Mobile Mobile
• Family
  Intel Core i9 Intel Core i7
• Generation
  11 12
• CPU group
  Intel Core i 11000H Intel Core i 1200P/1200U

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
  3.30 GHz 1.70 GHz
• Turbo (1 Core)
  5.30 GHz 4.70 GHz
• Hyperthreading
  Yes Yes
• Overclocking
  Yes No
• Core architecture
  normal hybrid (big.LITTLE)

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 UHD Graphics 910 Intel Iris Xe Graphics 96 (Alder Lake)
• GPU frequency
  0.35 GHz 0.35 GHz
• GPU (Turbo)
  1.45 GHz 1.25 GHz
• Execution units
  32 96
• Shader
  256 768
• Max. GPU Memory
  -- 64 GB
• Max. displays
  3 4
• Generation
  11 13
• Technology
  10 nm 10 nm
• Release date
  Q1/2022

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)
  Decode / Encode Decode / Encode
• h264
  Decode / Encode Decode / Encode
• VP9
  Decode / Encode Decode / Encode
• VP8
  Decode / Encode Decode
• AV1
  No Decode
• AVC
  Decode / Encode Decode / Encode
• VC-1
  Decode Decode
• JPEG
  Decode / Encode Decode / Encode

Types, channel quantity of RAM supported by Intel Core i7-1255U and Intel Core i9-11900KB. Depending on the motherboards, higher or lower memory frequencies may be supported.

• Memory type
  DDR4-3200 DDR4-3200DDR5-4800LPDDR4X-4266LPDDR5-5200
• Max. Memory
  128 GB 64 GB
• ECC
  No No
• Memory channels
  2 2

Compare the TDP requirements of TDP Intel Core i9-11900KB and Intel Core i7-1255U to select a cooling system. Note, the TDP value refers to thermal watts, not electrical watts.

• TDP (PL1)
  65 W 15 W
• TDP (PL2)
  -- 55 W
• TDP down
  55 W --
• Tjunction max.
  100 °C 100 °C

Architecture, interfaces, additional instructions supported by Intel Core i9-11900KB and Intel Core i9-11900KB, 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, AVX-512 SSE4.1, SSE4.2, AVX2
• L2-Cache
  4.00 MB 6.50 MB
• L3-Cache
  20.00 MB 12.00 MB
• Architecture
  Tiger Lake H Alder Lake U
• Technology
  10 nm 10 nm
• Socket
  BGA 1787 BGA 1744
• Release date
  Q2/2021 Q1/2022