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Core i7-8700k vs Ryzen 7 2700X


Description
The i7-8700k is based on Coffee Lake architecture while the 2700X is based on Zen+.

Using the multithread performance as a reference, the i7-8700k gets a score of 443.8 k points while the 2700X gets 433.2 k points.

Summarizing, the i7-8700k is 1 times faster than the 2700X. To get a proper comparison between both models, take a look to the data shown below.

Specs
CPUID
906ea
800f82
Core
Coffee Lake-S
Pinnacle Ridge
Architecture
Base frecuency
3.7 GHz
3.7 GHz
Boost frecuency
4.7 GHz
4.3 GHz
Socket
LGA 1151
AM4
Cores/Threads
6/12
8/16
TDP
95 W
105 W
Cache L1 (d+i)
6x32+6x32 kB
8x64+8x32 kB
Cache L2
6x256 kB
8x512 kB
Cache L3
12288 kB
16384 kB
Date
October 2017
April 2018

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
2700X
Test#1 (Integers)
4127
4255 (3.10%)
Test#2 (FP)
16959
19716 (16.25%)
Test#3 (Generic, ZIP)
5564
5841 (4.98%)
Test#1 (Memory)
12845
21357 (66.27%)
TOTAL
39495
51169 (29.56%)

Multithread

i7-8700k

2700X
Test#1 (Integers)
24011
35045 (45.95%)
Test#2 (FP)
108690
181421 (66.92%)
Test#3 (Generic, ZIP)
36616
64862 (77.14%)
Test#1 (Memory)
9327
8208 (-11.99%)
TOTAL
178644
289536 (62.07%)

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
2700X
Test#1 (Integers)
12920
15221 (17.81%)
Test#2 (FP)
20678
24118 (16.63%)
Test#3 (Generic, ZIP)
5295
5868 (10.81%)
Test#1 (Memory)
12587
21001 (66.85%)
TOTAL
51480
66206 (28.61%)

Multithread

i7-8700k

2700X
Test#1 (Integers)
94259
126815 (34.54%)
Test#2 (FP)
152549
229864 (50.68%)
Test#3 (Generic, ZIP)
39735
61736 (55.37%)
Test#1 (Memory)
8527
9770 (14.57%)
TOTAL
295071
428186 (45.11%)

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
2700X
Test#1 (Integers)
16874
14438 (-14.43%)
Test#2 (FP)
26119
24922 (-4.58%)
Test#3 (Generic, ZIP)
6329
5804 (-8.29%)
Test#1 (Memory)
13708
19072 (39.12%)
TOTAL
63030
64236 (1.91%)

Multithread

i7-8700k

2700X
Test#1 (Integers)
105740
122006 (15.38%)
Test#2 (FP)
180520
220344 (22.06%)
Test#3 (Generic, ZIP)
44994
59885 (33.10%)
Test#1 (Memory)
8512
9899 (16.30%)
TOTAL
339766
412133 (21.30%)

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
2700X
Test#1 (Integers)
31204
15613 (-49.96%)
Test#2 (FP)
27821
26078 (-6.27%)
Test#3 (Generic, ZIP)
6568
5835 (-11.15%)
Test#1 (Memory)
15004
18344 (22.26%)
TOTAL
80598
65870 (-18.27%)

Multithread

i7-8700k

2700X
Test#1 (Integers)
202422
123326 (-39.07%)
Test#2 (FP)
186332
240462 (29.05%)
Test#3 (Generic, ZIP)
44958
61231 (36.20%)
Test#1 (Memory)
10054
8168 (-18.75%)
TOTAL
443765
433187 (-2.38%)

Performance/W
i7-8700k
2700X
Test#1 (Integers)
2131 points/W
1175 points/W
Test#2 (FP)
1961 points/W
2290 points/W
Test#3 (Generic, ZIP)
473 points/W
583 points/W
Test#1 (Memory)
106 points/W
78 points/W
TOTAL
4671 points/W
4126 points/W

Performance/GHz
i7-8700k
2700X
Test#1 (Integers)
6639 points/GHz
3631 points/GHz
Test#2 (FP)
5919 points/GHz
6065 points/GHz
Test#3 (Generic, ZIP)
1397 points/GHz
1357 points/GHz
Test#1 (Memory)
3192 points/GHz
4266 points/GHz
TOTAL
17148 points/GHz
15319 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