| | | |

Core i7-8700k vs i7-4790


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

Using the multithread performance as a reference, the i7-8700k gets a score of 443.8 k points while the i7-4790 gets 191.7 k points.

Summarizing, the i7-8700k is 2.3 times faster than the i7-4790 . 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
3.6 GHz
Boost frecuency
4.7 GHz
4 GHz
Socket
LGA 1151
LGA 1150
Cores/Threads
6/12
4/8
TDP
95 W
84 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
i7-4790
Test#1 (Integers)
4127
4532 (9.82%)
Test#2 (FP)
16959
11241 (-33.72%)
Test#3 (Generic, ZIP)
5564
5068 (-8.92%)
Test#1 (Memory)
12845
4640 (-63.88%)
TOTAL
39495
25481 (-35.48%)

Multithread

i7-8700k

i7-4790
Test#1 (Integers)
24011
15772 (-34.31%)
Test#2 (FP)
108690
55237 (-49.18%)
Test#3 (Generic, ZIP)
36616
24154 (-34.03%)
Test#1 (Memory)
9327
5759 (-38.25%)
TOTAL
178644
100923 (-43.51%)

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
i7-4790
Test#1 (Integers)
12920
13619 (5.41%)
Test#2 (FP)
20678
12112 (-41.43%)
Test#3 (Generic, ZIP)
5295
5259 (-0.68%)
Test#1 (Memory)
12587
4575 (-63.65%)
TOTAL
51480
35565 (-30.91%)

Multithread

i7-8700k

i7-4790
Test#1 (Integers)
94259
56096 (-40.49%)
Test#2 (FP)
152549
55018 (-63.93%)
Test#3 (Generic, ZIP)
39735
24955 (-37.20%)
Test#1 (Memory)
8527
6598 (-22.63%)
TOTAL
295071
142666 (-51.65%)

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
i7-8700k
i7-4790
Test#1 (Integers)
16874
13992 (-17.08%)
Test#2 (FP)
26119
12853 (-50.79%)
Test#3 (Generic, ZIP)
6329
5373 (-15.11%)
Test#1 (Memory)
13708
4910 (-64.18%)
TOTAL
63030
37128 (-41.09%)

Multithread

i7-8700k

i7-4790
Test#1 (Integers)
105740
57834 (-45.31%)
Test#2 (FP)
180520
61912 (-65.70%)
Test#3 (Generic, ZIP)
44994
24422 (-45.72%)
Test#1 (Memory)
8512
7361 (-13.52%)
TOTAL
339766
151529 (-55.40%)

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
i7-4790
Test#1 (Integers)
31204
23288 (-25.37%)
Test#2 (FP)
27821
12577 (-54.79%)
Test#3 (Generic, ZIP)
6568
5408 (-17.66%)
Test#1 (Memory)
15004
4995 (-66.71%)
TOTAL
80598
46268 (-42.59%)

Multithread

i7-8700k

i7-4790
Test#1 (Integers)
202422
96887 (-52.14%)
Test#2 (FP)
186332
62902 (-66.24%)
Test#3 (Generic, ZIP)
44958
25201 (-43.95%)
Test#1 (Memory)
10054
6741 (-32.95%)
TOTAL
443765
191731 (-56.79%)

Performance/W
i7-8700k
i7-4790
Test#1 (Integers)
2131 points/W
1153 points/W
Test#2 (FP)
1961 points/W
749 points/W
Test#3 (Generic, ZIP)
473 points/W
300 points/W
Test#1 (Memory)
106 points/W
80 points/W
TOTAL
4671 points/W
2283 points/W

Performance/GHz
i7-8700k
i7-4790
Test#1 (Integers)
6639 points/GHz
5822 points/GHz
Test#2 (FP)
5919 points/GHz
3144 points/GHz
Test#3 (Generic, ZIP)
1397 points/GHz
1352 points/GHz
Test#1 (Memory)
3192 points/GHz
1249 points/GHz
TOTAL
17148 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