Intel Core i5 4278U 

Released July, 2014
  • 2.6 GHz
  • Dual core

Benchmarks Real world tests of the Intel Core i5 4278U

CompuBench 1.5 (Bitcoin mining) Data courtesy CompuBench

Core i5 4278U
20.18 mHash/s
Core i5 5257U
54.21 mHash/s
Core i7 3615QM
8.64 mHash/s

CompuBench 1.5 (Face detection)

Core i5 4278U
15.94 mPixels/s
Core i7 3615QM
3.18 mPixels/s
Core i5 5257U
20.24 mPixels/s

CompuBench 1.5 (T-Rex) Data courtesy CompuBench

Core i5 4278U
1.24 fps
Core i5 5257U
1.53 fps
Core i7 3615QM
1.09 fps

GeekBench 3 (Multi-core) Data courtesy Primate Labs

Core i5 4278U

GeekBench 3 (Single core) Data courtesy Primate Labs

Core i5 4278U

GeekBench 3 (AES single core) Data courtesy Primate Labs

Core i5 4278U
3,900,000 MB/s
Core i7 3615QM
2,220,000 MB/s
Core i5 5257U
3,910,000 MB/s

PassMark Data courtesy Passmark

Core i5 4278U

PassMark (Single Core)

Core i5 4278U

Specifications Full list of technical specs


Clock speed 2.6 GHz
Turbo clock speed 3.1 GHz
Cores Dual core
Is unlocked No


Has a NX bit Yes
Supports trusted computing No
Has virtualization support Yes
Instruction set extensions
  1. MMX
  2. AES
  3. SSE
  4. SSE2
  5. SSE4.1
  6. SSE3
  7. Supplemental SSE3
  8. SSE4.2
  9. AVX 2.0
  10. AVX
  11. SSE4
Supports dynamic frequency scaling Yes

power consumption

Annual home energy cost 6.75 $/year
Performance per watt 35.39 pt/W
Typical power consumption 22.75W


Architecture DMI 2.0
Transfer rate 5,000 MT/s


Architecture x86-64
Threads 4 threads
L2 cache 0.5 MB
L2 cache per core 0.25 MB/core
L3 cache 3 MB
L3 cache per core 1.5 MB/core
Manufacture process 22 nm
Max CPUs 1


Overclocked clock speed 2.99 GHz
Overclocked clock speed (Water) 2.6 GHz
Overclocked clock speed (Air) 2.99 GHz

integrated graphics

Label Intel® Iris™ Graphics 5100
Number of displays supported 3
GPU clock speed 200 MHz
Turbo clock speed 1,100 MHz

memory controller

Memory controller Built-in
Memory type DDR3L-1333
Channels Dual Channel
Supports ECC No
Maximum bandwidth 12,800 MB/s
Maximum memory size 16,384 MB
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