CPUBoss Review Our evaluation of 4790 vs 6400 among all CPUs

Performance

Benchmark performance using all cores

PCMark 8 Home 3.0 Accelerated, PassMark and 1 more

Single-core Performance

Individual core benchmark performance

PassMark (Single Core), Geekbench 3 Single Core and 1 more

Integrated Graphics

Integrated GPU performance for graphics

Sky Diver and Cloud Gate

Integrated Graphics (OpenCL)

Integrated GPU performance for parallel computing

CompuBench 1.5 Bitcoin mining and 4 more

Performance per Watt

How efficiently does the processor use electricity?

Sky Diver, Cloud Gate, CompuBench 1.5 Bitcoin mining and 11 more

Value

Are you paying a premium for performance?

Sky Diver, Cloud Gate, CompuBench 1.5 Bitcoin mining and 11 more

8.7

CPUBoss Score

Combination of all six facets

Winner
Intel Core i7 4790 

CPUBoss recommends the Intel Core i7 4790  based on its performance, single-core performance and value.

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VS

Intel Core i7 4790

CPUBoss Winner
Front view of Intel Core i7 4790

Differences What are the advantages of each

Front view of Intel Core i7 4790

Reasons to consider the
Intel Core i7 4790

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Significantly higher clock speed 3.6 GHz vs 2.7 GHz Around 35% higher clock speed
Higher turbo clock speed 4 GHz vs 3.3 GHz More than 20% higher turbo clock speed
Much better performance per dollar 2.97 pt/$ vs 0.98 pt/$ More than 3x better performance per dollar
Much better turbo clock speed 1,200 MHz vs 950 MHz More than 25% better turbo clock speed
Much better performance per watt 10.77 pt/W vs 2.82 pt/W More than 3.8x better performance per watt
Supports trusted computing Yes vs No Somewhat common; Allows for safer, more reliable computing
Slightly more l3 cache 8 MB vs 6 MB Around 35% more l3 cache; more data can be stored in the l3 cache for quick access later
Better PassMark (Single core) score 2,284 vs 1,832 Around 25% better PassMark (Single core) score
Better PassMark score 9,996 vs 6,727 Around 50% better PassMark score
More threads 8 vs 4 Twice as many threads
More l3 cache per core 2 MB/core vs 1.5 MB/core Around 35% more l3 cache per core
Front view of Intel Core i5 6400

Reasons to consider the
Intel Core i5 6400

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Significantly newer manufacturing process 14 nm vs 22 nm A newer manufacturing process allows for a more powerful, yet cooler running processor
Lower typical power consumption 52.81W vs 68.25W Around 25% lower typical power consumption
Newer Jul, 2015 vs May, 2014 Release date over 1 years later
Lower annual home energy cost 15.66 $/year vs 20.24 $/year Around 25% lower annual home energy cost
Lower annual commercial energy cost 56.94 $/year vs 73.58 $/year Around 25% lower annual commercial energy cost

Benchmarks Real world tests of Core i7 4790 vs i5 6400

CompuBench 1.5 (Bitcoin mining) Data courtesy CompuBench

Core i7 4790
15.62 mHash/s
Core i5 6400
24.49 mHash/s

CompuBench 1.5 (Face detection)

Core i7 4790
16.69 mPixels/s
Core i5 6400
19.56 mPixels/s

CompuBench 1.5 (T-Rex) Data courtesy CompuBench

Core i7 4790
1.96 fps
Core i5 6400
1.35 fps

GeekBench 3 (Multi-core) Data courtesy Primate Labs

Core i7 4790
13,718
Core i5 6400
3,989.5

GeekBench 3 (Single core) Data courtesy Primate Labs

Core i7 4790
3,632
Core i5 6400
2,428.5

GeekBench 3 (AES single core) Data courtesy Primate Labs

Core i7 4790
4,570,000 MB/s
Core i5 6400
155.25 MB/s

PassMark Data courtesy Passmark

PassMark (Single Core)

Specifications Full list of technical specs

summary

Core i7 4790  vs
i5 6400 
Clock speed 3.6 GHz 2.7 GHz
Turbo clock speed 4 GHz 3.3 GHz
Cores Quad core Quad core
Is unlocked No No

features

Has a NX bit Yes Yes
Supports trusted computing Yes No
Has virtualization support Yes Yes
Instruction set extensions
SSE2
F16C
MMX
SSE4
AVX
SSE3
EM64T
SSE
SSE4.1
FMA3
SSE4.2
Supplemental SSE3
AES
AVX 2.0
Supports dynamic frequency scaling Yes Yes

memory controller

Memory controller Built-in Built-in
Memory type
DDR3-1600
DDR3L-1600
DDR3-1333
Channels Dual Channel Dual Channel
Supports ECC No No
Maximum bandwidth 25,600 MB/s 25,600 MB/s
Maximum memory size 32,768 MB 65,536 MB

details

Core i7 4790  vs
i5 6400 
Architecture x86-64 x86-64
Threads 8 4
L3 cache 8 MB 6 MB
L3 cache per core 2 MB/core 1.5 MB/core
Manufacture process 22 nm 14 nm
Max CPUs 1 1
Operating temperature Unknown - 72.72°C Unknown - 71°C

integrated graphics

GPU GPU GPU
Label Intel® HD Graphics 4600 Intel® HD Graphics 530
Number of displays supported 3 3
GPU clock speed 350 MHz 350 MHz
Turbo clock speed 1,200 MHz 950 MHz

power consumption

TDP 84W 65W
Annual home energy cost 20.24 $/year 15.66 $/year
Annual commercial energy cost 73.58 $/year 56.94 $/year
Performance per watt 10.77 pt/W 2.82 pt/W
Typical power consumption 68.25W 52.81W

bus

Architecture DMI 2.0 FSB
Number of links 0 1
Transfer rate 5,000 MT/s 8,000 MT/s
Intel Core i7 4790
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Intel Core i5 6400
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Comments

Showing 1 comment.
I planing to buy a new pc. Go with the i7 for the performance or the i5 for the "good" price(at my country evrithing is overpriced). I think the Skylake is better bicous is newer and i can upgrade to next gen. Or wait for the Kaby Lake i5 and buy he?
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