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Core i7-7700K vs i7-4790


Description
The i7-7700K is based on Kaby Lake architecture while the i7-4790 is based on Haswell.

Using the multithread performance as a reference, the i7-7700K gets a score of 291.1 k points while the i7-4790 gets 191.7 k points.

Summarizing, the i7-7700K is 1.5 times faster than the i7-4790 . To get a proper comparison between both models, take a look to the data shown below.

Specs
CPUID
906e9
306c3
Core
Kaby Lake-S
Haswell
Architecture
Base frecuency
4.2 GHz
3.6 GHz
Boost frecuency
4.5 GHz
4 GHz
Socket
LGA 1151
LGA 1150
Cores/Threads
4/8
4/8
TDP
95 W
84 W
Cache L1 (d+i)
32+32 kB
32+32 kB
Cache L2
256 kB
256 kB
Cache L3
8192 kB
8192 kB
Date
September 2016
May 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
i7-4790
Test#1 (Integers)
4629
4532 (-2.10%)
Test#2 (FP)
18925
11241 (-40.60%)
Test#3 (Generic, ZIP)
6221
5068 (-18.54%)
Test#1 (Memory)
13922
4640 (-66.67%)
TOTAL
43698
25481 (-41.69%)

Multithread

i7-7700K

i7-4790
Test#1 (Integers)
18529
15772 (-14.88%)
Test#2 (FP)
86487
55237 (-36.13%)
Test#3 (Generic, ZIP)
28778
24154 (-16.07%)
Test#1 (Memory)
9674
5759 (-40.47%)
TOTAL
143468
100923 (-29.65%)

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
i7-4790
Test#1 (Integers)
17549
13992 (-20.27%)
Test#2 (FP)
27822
12853 (-53.80%)
Test#3 (Generic, ZIP)
6796
5373 (-20.94%)
Test#1 (Memory)
14832
4910 (-66.89%)
TOTAL
66999
37128 (-44.58%)

Multithread

i7-7700K

i7-4790
Test#1 (Integers)
68395
57834 (-15.44%)
Test#2 (FP)
118805
61912 (-47.89%)
Test#3 (Generic, ZIP)
33336
24422 (-26.74%)
Test#1 (Memory)
17434
7361 (-57.78%)
TOTAL
237970
151529 (-36.32%)

AVX2 optimized benchmark
The benchmark in mode III (AVX2), like AVX1, is optimized to used 256 bits registers beside the second version of the Advanced Vector Extensions (AVX). The first AVX2 compatible CPU was released in 2013.
Monothread
i7-7700K
i7-4790
Test#1 (Integers)
30864
23288 (-24.54%)
Test#2 (FP)
27262
12577 (-53.86%)
Test#3 (Generic, ZIP)
6421
5408 (-15.78%)
Test#1 (Memory)
13994
4995 (-64.31%)
TOTAL
78541
46268 (-41.09%)

Multithread

i7-7700K

i7-4790
Test#1 (Integers)
129531
96887 (-25.20%)
Test#2 (FP)
122200
62902 (-48.53%)
Test#3 (Generic, ZIP)
29617
25201 (-14.91%)
Test#1 (Memory)
9751
6741 (-30.87%)
TOTAL
291099
191731 (-34.14%)

Performance/W
i7-7700K
i7-4790
Test#1 (Integers)
1363 points/W
1153 points/W
Test#2 (FP)
1286 points/W
749 points/W
Test#3 (Generic, ZIP)
312 points/W
300 points/W
Test#1 (Memory)
103 points/W
80 points/W
TOTAL
3064 points/W
2283 points/W

Performance/GHz
i7-7700K
i7-4790
Test#1 (Integers)
6859 points/GHz
5822 points/GHz
Test#2 (FP)
6058 points/GHz
3144 points/GHz
Test#3 (Generic, ZIP)
1427 points/GHz
1352 points/GHz
Test#1 (Memory)
3110 points/GHz
1249 points/GHz
TOTAL
17453 points/GHz
11567 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