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Core i7-8700k vs Ryzen 7 1800X


Description
The i7-8700k is based on Coffee Lake architecture while the 1800X is based on Zen.

Using the multithread performance as a reference, the i7-8700k gets a score of 443.8 k points while the 1800X gets 410.5 k points.

Summarizing, the i7-8700k is 1.1 times faster than the 1800X. To get a proper comparison between both models, take a look to the data shown below.

Specs
CPUID
906ea
800f11
Core
Coffee Lake-S
Summit Ridge
Architecture
Base frecuency
3.7 GHz
3.6 GHz
Boost frecuency
4.7 GHz
4 GHz
Socket
LGA 1151
AM4
Cores/Threads
6/12
8/16
TDP
95 W
95 W
Cache L1 (d+i)
6x32+6x32 kB
8x64+8x32 kB
Cache L2
6x256 kB
8x512 kB
Cache L3
12288 kB
2x8192 kB
Date
October 2017
March 2017

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
1800X
Test#1 (Integers)
4127
4145 (0.43%)
Test#2 (FP)
16959
19069 (12.44%)
Test#3 (Generic, ZIP)
5564
5770 (3.70%)
Test#1 (Memory)
12845
18279 (42.30%)
TOTAL
39495
47262 (19.67%)

Multithread

i7-8700k

1800X
Test#1 (Integers)
24011
34478 (43.59%)
Test#2 (FP)
108690
169652 (56.09%)
Test#3 (Generic, ZIP)
36616
63680 (73.91%)
Test#1 (Memory)
9327
8201 (-12.07%)
TOTAL
178644
276012 (54.50%)

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
1800X
Test#1 (Integers)
16874
15105 (-10.48%)
Test#2 (FP)
26119
23462 (-10.17%)
Test#3 (Generic, ZIP)
6329
5638 (-10.92%)
Test#1 (Memory)
13708
17516 (27.78%)
TOTAL
63030
61721 (-2.08%)

Multithread

i7-8700k

1800X
Test#1 (Integers)
105740
119500 (13.01%)
Test#2 (FP)
180520
198786 (10.12%)
Test#3 (Generic, ZIP)
44994
59748 (32.79%)
Test#1 (Memory)
8512
11583 (36.09%)
TOTAL
339766
389617 (14.67%)

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
1800X
Test#1 (Integers)
31204
15023 (-51.86%)
Test#2 (FP)
27821
24260 (-12.80%)
Test#3 (Generic, ZIP)
6568
5526 (-15.86%)
Test#1 (Memory)
15004
16260 (8.37%)
TOTAL
80598
61068 (-24.23%)

Multithread

i7-8700k

1800X
Test#1 (Integers)
202422
122923 (-39.27%)
Test#2 (FP)
186332
220322 (18.24%)
Test#3 (Generic, ZIP)
44958
59780 (32.97%)
Test#1 (Memory)
10054
7441 (-25.99%)
TOTAL
443765
410465 (-7.50%)

Performance/W
i7-8700k
1800X
Test#1 (Integers)
2131 points/W
1294 points/W
Test#2 (FP)
1961 points/W
2319 points/W
Test#3 (Generic, ZIP)
473 points/W
629 points/W
Test#1 (Memory)
106 points/W
78 points/W
TOTAL
4671 points/W
4321 points/W

Performance/GHz
i7-8700k
1800X
Test#1 (Integers)
6639 points/GHz
3756 points/GHz
Test#2 (FP)
5919 points/GHz
6065 points/GHz
Test#3 (Generic, ZIP)
1397 points/GHz
1382 points/GHz
Test#1 (Memory)
3192 points/GHz
4065 points/GHz
TOTAL
17148 points/GHz
15267 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