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Core i7-7700K vs i7-5820K


Description
The i7-7700K is based on Kaby Lake architecture while the i7-5820K is based on Haswell.

Using the multithread performance as a reference, the i7-7700K gets a score of 238 k points while the i7-5820K gets 129.1 k points.

Summarizing, the i7-7700K is 1.8 times faster than the i7-5820K . To get a proper comparison between both models, take a look to the data shown below.

Specs
CPUID
906e9
306f2
Core
Kaby Lake-S
Haswell-E
Architecture
Base frecuency
4.2 GHz
3.3 GHz
Boost frecuency
4.5 GHz
3.6 GHz
Socket
LGA 1151
LGA 1150
Cores/Threads
4/8
6/12
TDP
95 W
140 W
Cache L1 (d+i)
32+32 kB
32+32 kB
Cache L2
256 kB
256 kB
Cache L3
8192 kB
15360 kB
Date
September 2016
September 2014

Non-optimized benchmark
The benchmark in Mode 0 (FPU) measures cpu performance with non-optimized software. It uses the basic µinstructions from the i386 architecture with the i387 floating point unit. This mode is compatible with all CPUs so it's practical to compare very different CPUs
Monothread
i7-7700K
i7-5820K
Test#1 (Integers)
4629
3822 (-17.45%)
Test#2 (FP)
18925
9641 (-49.05%)
Test#3 (Generic, ZIP)
6221
4286 (-31.10%)
Test#1 (Memory)
13922
3781 (-72.84%)
TOTAL
43698
21530 (-50.73%)

Multithread

i7-7700K

i7-5820K
Test#1 (Integers)
18529
18067 (-2.50%)
Test#2 (FP)
86487
64252 (-25.71%)
Test#3 (Generic, ZIP)
28778
27029 (-6.08%)
Test#1 (Memory)
9674
8034 (-16.95%)
TOTAL
143468
117381 (-18.18%)

AVX optimized benchmark
The benchmark in mode II (AVX) is optimized to used 256 bits registers beside the first version of the Advanced Vector Extensions (AVX). The first AVX compatible CPU was released in 2011.
Monothread
i7-7700K
i7-5820K
Test#1 (Integers)
17549
12034 (-31.43%)
Test#2 (FP)
27822
11229 (-59.64%)
Test#3 (Generic, ZIP)
6796
4549 (-33.06%)
Test#1 (Memory)
14832
3720 (-74.92%)
TOTAL
66999
31532 (-52.94%)

Multithread

i7-7700K

i7-5820K
Test#1 (Integers)
68395
49480 (-27.66%)
Test#2 (FP)
118805
52213 (-56.05%)
Test#3 (Generic, ZIP)
33336
19703 (-40.90%)
Test#1 (Memory)
17434
7666 (-56.03%)
TOTAL
237970
129061 (-45.77%)

Performance/W
i7-7700K
i7-5820K
Test#1 (Integers)
720 points/W
353 points/W
Test#2 (FP)
1251 points/W
373 points/W
Test#3 (Generic, ZIP)
351 points/W
141 points/W
Test#1 (Memory)
184 points/W
55 points/W
TOTAL
2505 points/W
922 points/W

Performance/GHz
i7-7700K
i7-5820K
Test#1 (Integers)
3900 points/GHz
3343 points/GHz
Test#2 (FP)
6183 points/GHz
3119 points/GHz
Test#3 (Generic, ZIP)
1510 points/GHz
1264 points/GHz
Test#1 (Memory)
3296 points/GHz
1033 points/GHz
TOTAL
14889 points/GHz
8759 points/GHz

Monothread performance graph
Monothread performance graphics gives the performance vs time. They are useful to measure the time it takes to the CPU to reach the maximum performance.

Usually, CPU's performance will be steady during these tests but if it has a slow frequency strategy, the first samples will show a lower score.


Test#1 (Integers) [points vs time]

grafica bm.hardlimit.com


Test#2 (FP) [points vs time]

grafica bm.hardlimit.com


Test#3 (Generic, ZIP) [points vs time]

grafica bm.hardlimit.com


Test#1 (Memory) [points vs time]

grafica bm.hardlimit.com

Multithread performance graph
Multithread graphs measure the performance against a heavy load during certain time.

If CPU's TDP doesn't limit the frequency and the machine is properly cooled, performance should remain steady vs time. Otherwise, the performance score will oscillate or decrease over time.


Test#1 (Integers) [points vs time]

grafica bm.hardlimit.com


Test#2 (FP) [points vs time]

grafica bm.hardlimit.com


Test#3 (Generic, ZIP) [points vs time]

grafica bm.hardlimit.com


Test#1 (Memory) [points vs time]

grafica bm.hardlimit.com

Hardlimit Benchmark Central - Ver. 3.7.9