Intel Core i5-8257U vs Intel Core i5-8259U. Specifications, performance, tests

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

• Segment
  Mobile Mobile
• Family
  Intel Core i5 Intel Core i5
• Generation
  8 8
• CPU group
  Intel Core i 8000U Intel Core i 8000U

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
  1.40 GHz 2.30 GHz
• CPU Cores
  4 4
• Turbo (1 Core)
  3.90 GHz 3.80 GHz
• CPU Threads
  8 8
• Turbo (4 Cores)
  3.20 GHz 3.20 GHz
• 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 Plus Graphics 645 Intel Iris Plus Graphics 655
• GPU frequency
  0.30 GHz 0.30 GHz
• GPU (Turbo)
  1.05 GHz 1.05 GHz
• Execution units
  48 48
• Shader
  384 384
• Max. GPU Memory
  32 GB 32 GB
• Max. displays
  3 3
• Generation
  9.5 9.5
• DirectX Version
  12 12
• Technology
  14 nm 14 nm
• Release date
  Q4/2017 Q4/2017

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 / 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 i5-8259U and Intel Core i5-8257U. Depending on the motherboards, higher or lower memory frequencies may be supported.

• Memory type
  DDR4-2400 SO-DIMMLPDDR3-2133 DDR4-2400 SO-DIMM
• Max. Memory
  32 GB
• ECC
  No No
• Memory channels
  2 2
• PCIe version
  3.0 3.0
• PCIe lanes
  16 16

• AES-NI
  Yes Yes

Compare the TDP requirements of TDP Intel Core i5-8257U and Intel Core i5-8259U to select a cooling system. Note, the TDP value refers to thermal watts, not electrical watts.

• TDP (PL1)
  15 W 28 W

Architecture, interfaces, additional instructions supported by Intel Core i5-8257U and Intel Core i5-8257U, 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
  6.00 MB 6.00 MB
• Architecture
  Coffee Lake U Coffee Lake U
• Technology
  14 nm 14 nm
• Socket
  BGA 1528 BGA 1528
• Release date
  Q3/2019 Q2/2018