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Core i7-8700k vs i7-4790K


Description
The i7-8700k is based on Coffee Lake architecture while the i7-4790K is based on Haswell.

Using the multithread performance as a reference, the i7-8700k gets a score of 443.8 k points while the i7-4790K gets 219.5 k points.

Summarizing, the i7-8700k is 2 times faster than the i7-4790K . To get a proper comparison between both models, take a look to the data shown below.

Specs
CPUID
906ea
306c3
Core
Coffee Lake-S
Haswell
Architecture
Base frecuency
3.7 GHz
4 GHz
Boost frecuency
4.7 GHz
4.4 GHz
Socket
LGA 1151
LGA 1150
Cores/Threads
6/12
4/8
TDP
95 W
88 W
Cache L1 (d+i)
6x32+6x32 kB
32+32 kB
Cache L2
6x256 kB
256 kB
Cache L3
12288 kB
8192 kB
Date
October 2017
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
i7-8700k
i7-4790K
Test#1 (Integers)
4127
5065 (22.72%)
Test#2 (FP)
16959
12626 (-25.55%)
Test#3 (Generic, ZIP)
5564
5815 (4.51%)
Test#1 (Memory)
12845
4963 (-61.36%)
TOTAL
39495
28468 (-27.92%)

Multithread

i7-8700k

i7-4790K
Test#1 (Integers)
24011
18283 (-23.86%)
Test#2 (FP)
108690
64071 (-41.05%)
Test#3 (Generic, ZIP)
36616
27522 (-24.84%)
Test#1 (Memory)
9327
7970 (-14.55%)
TOTAL
178644
117844 (-34.03%)

SSE3 optimized benchmark
The benchmark in mode I (SSE) is optimized for the use of SIMD instructions with 128 bits register and the SSE set up to version 3. Nearly every modern CPU has support for this mode.
Monothread
i7-8700k
i7-4790K
Test#1 (Integers)
12920
15603 (20.77%)
Test#2 (FP)
20678
13919 (-32.69%)
Test#3 (Generic, ZIP)
5295
6125 (15.66%)
Test#1 (Memory)
12587
5001 (-60.27%)
TOTAL
51480
40647 (-21.04%)

Multithread

i7-8700k

i7-4790K
Test#1 (Integers)
94259
65477 (-30.53%)
Test#2 (FP)
152549
63290 (-58.51%)
Test#3 (Generic, ZIP)
39735
27929 (-29.71%)
Test#1 (Memory)
8527
7841 (-8.05%)
TOTAL
295071
164537 (-44.24%)

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
i7-8700k
i7-4790K
Test#1 (Integers)
16874
15800 (-6.36%)
Test#2 (FP)
26119
14346 (-45.07%)
Test#3 (Generic, ZIP)
6329
5974 (-5.62%)
Test#1 (Memory)
13708
5166 (-62.32%)
TOTAL
63030
41285 (-34.50%)

Multithread

i7-8700k

i7-4790K
Test#1 (Integers)
105740
62785 (-40.62%)
Test#2 (FP)
180520
66483 (-63.17%)
Test#3 (Generic, ZIP)
44994
26352 (-41.43%)
Test#1 (Memory)
8512
8739 (2.67%)
TOTAL
339766
164359 (-51.63%)

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
i7-8700k
i7-4790K
Test#1 (Integers)
31204
26714 (-14.39%)
Test#2 (FP)
27821
15101 (-45.72%)
Test#3 (Generic, ZIP)
6568
6186 (-5.81%)
Test#1 (Memory)
15004
5554 (-62.98%)
TOTAL
80598
53555 (-33.55%)

Multithread

i7-8700k

i7-4790K
Test#1 (Integers)
202422
109572 (-45.87%)
Test#2 (FP)
186332
71887 (-61.42%)
Test#3 (Generic, ZIP)
44958
28440 (-36.74%)
Test#1 (Memory)
10054
9603 (-4.48%)
TOTAL
443765
219503 (-50.54%)

Performance/W
i7-8700k
i7-4790K
Test#1 (Integers)
2131 points/W
1245 points/W
Test#2 (FP)
1961 points/W
817 points/W
Test#3 (Generic, ZIP)
473 points/W
323 points/W
Test#1 (Memory)
106 points/W
109 points/W
TOTAL
4671 points/W
2494 points/W

Performance/GHz
i7-8700k
i7-4790K
Test#1 (Integers)
6639 points/GHz
6071 points/GHz
Test#2 (FP)
5919 points/GHz
3432 points/GHz
Test#3 (Generic, ZIP)
1397 points/GHz
1406 points/GHz
Test#1 (Memory)
3192 points/GHz
1262 points/GHz
TOTAL
17148 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