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Core i7-7700K vs i7-4790K


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

Using the multithread performance as a reference, the i7-7700K gets a score of 291.1 k points while the i7-4790K gets 219.5 k points.

Summarizing, the i7-7700K is 1.3 times faster than the i7-4790K . 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
4 GHz
Boost frecuency
4.5 GHz
4.4 GHz
Socket
LGA 1151
LGA 1150
Cores/Threads
4/8
4/8
TDP
95 W
88 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
i7-4790K
Test#1 (Integers)
4629
5065 (9.40%)
Test#2 (FP)
18925
12626 (-33.28%)
Test#3 (Generic, ZIP)
6221
5815 (-6.54%)
Test#1 (Memory)
13922
4963 (-64.35%)
TOTAL
43698
28468 (-34.85%)

Multithread

i7-7700K

i7-4790K
Test#1 (Integers)
18529
18283 (-1.33%)
Test#2 (FP)
86487
64071 (-25.92%)
Test#3 (Generic, ZIP)
28778
27522 (-4.37%)
Test#1 (Memory)
9674
7970 (-17.62%)
TOTAL
143468
117844 (-17.86%)

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
i7-4790K
Test#1 (Integers)
17549
15800 (-9.96%)
Test#2 (FP)
27822
14346 (-48.44%)
Test#3 (Generic, ZIP)
6796
5974 (-12.10%)
Test#1 (Memory)
14832
5166 (-65.17%)
TOTAL
66999
41285 (-38.38%)

Multithread

i7-7700K

i7-4790K
Test#1 (Integers)
68395
62785 (-8.20%)
Test#2 (FP)
118805
66483 (-44.04%)
Test#3 (Generic, ZIP)
33336
26352 (-20.95%)
Test#1 (Memory)
17434
8739 (-49.88%)
TOTAL
237970
164359 (-30.93%)

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
i7-4790K
Test#1 (Integers)
30864
26714 (-13.44%)
Test#2 (FP)
27262
15101 (-44.61%)
Test#3 (Generic, ZIP)
6421
6186 (-3.66%)
Test#1 (Memory)
13994
5554 (-60.31%)
TOTAL
78541
53555 (-31.81%)

Multithread

i7-7700K

i7-4790K
Test#1 (Integers)
129531
109572 (-15.41%)
Test#2 (FP)
122200
71887 (-41.17%)
Test#3 (Generic, ZIP)
29617
28440 (-3.97%)
Test#1 (Memory)
9751
9603 (-1.52%)
TOTAL
291099
219503 (-24.59%)

Performance/W
i7-7700K
i7-4790K
Test#1 (Integers)
1363 points/W
1245 points/W
Test#2 (FP)
1286 points/W
817 points/W
Test#3 (Generic, ZIP)
312 points/W
323 points/W
Test#1 (Memory)
103 points/W
109 points/W
TOTAL
3064 points/W
2494 points/W

Performance/GHz
i7-7700K
i7-4790K
Test#1 (Integers)
6859 points/GHz
6071 points/GHz
Test#2 (FP)
6058 points/GHz
3432 points/GHz
Test#3 (Generic, ZIP)
1427 points/GHz
1406 points/GHz
Test#1 (Memory)
3110 points/GHz
1262 points/GHz
TOTAL
17453 points/GHz
12172 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