Intel Core i7-4558U vs Intel Core i7-4578U. Specifications, performance, tests

Comprehensive background on the processors being compared, detailing their series, generation, and targeted market segment.

• Segment
  Mobile Mobile
• Family
  Intel Core i7 Intel Core i7
• Generation
  4 4
• CPU group
  Intel Core i 4000U Intel Core i 4000U

Essential parameters including the number of cores, threads, base and turbo frequencies, and cache size. These metrics provide insight into the processor’s speed—higher values generally indicate better performance.

• Frequency
  2.80 GHz 3.00 GHz
• CPU Cores
  2 2
• Turbo (1 Core)
  3.30 GHz 3.50 GHz
• CPU Threads
  4 4
• Turbo (2 Cores)
  3.10 GHz No turbo
• Hyperthreading
  Yes Yes
• Overclocking
  No No
• Core architecture
  normal normal

The integrated graphics (iGPU) do not influence the CPU performance significantly; they serve as a substitute for a dedicated graphics card in the absence of one or are utilized in mobile devices.

• GPU name
  Intel Iris Graphics 5100 Intel Iris Graphics 5100
• GPU frequency
  0.20 GHz 0.20 GHz
• GPU (Turbo)
  1.20 GHz 1.20 GHz
• Execution units
  40 40
• Shader
  320 320
• Max. GPU Memory
  2 GB 2 GB
• Max. displays
  3 3
• Generation
  7.5 7.5
• DirectX Version
  11.1 11.1
• Technology
  22 nm 22 nm
• Release date
  Q2/2013 Q2/2013

This section details the built-in codecs used for encoding and decoding media content, which significantly enhance processing speed and efficiency.

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

Overview of the types and quantities of RAM supported by Intel Core i7-4578U and Intel Core i7-4558U. The supported memory frequencies may vary depending on the motherboard configuration.

• Memory type
  DDR3L-1333 SO-DIMMDDR3L-1600 SO-DIMM DDR3L-1333 SO-DIMMDDR3L-1600 SO-DIMMLPDDR3-1333LPDDR3-1600
• Max. Memory
  16 GB 16 GB
• ECC
  No No
• Memory channels
  2 2
• PCIe version
  2.0 2.0
• PCIe lanes
  12 12

• AES-NI
  Yes Yes

Analyze the TDP (Thermal Design Power) requirements of Intel Core i7-4558U and Intel Core i7-4578U to make an informed decision on the appropriate cooling system. Remember that TDP refers to thermal watts, not electrical watts.

• TDP (PL1)
  28 W 28 W
• Tjunction max.
  100 °C --

Information on architecture, interfaces, and additional instructions supported by Intel Core i7-4558U and Intel Core i7-4578U, including virtual machine technologies and fabrication processes.

• 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 4.00 MB
• Architecture
  Haswell U Haswell U
• Technology
  22 nm 22 nm
• Socket
  BGA 1168 BGA 1168
• Release date
  Q3/2013 Q3/2014