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Core i7-8700k vs Ryzen 7 3700X


Description
The i7-8700k is based on Coffee Lake architecture while the 3700X is based on Zen 2.

Using the multithread performance as a reference, the i7-8700k gets a score of 443.8 k points while the 3700X gets 482.1 k points.

Summarizing, the 3700X is 1.1 times faster than the i7-8700k. To get a proper comparison between both models, take a look to the data shown below.

Specs
CPUID
906ea
870f10
Core
Coffee Lake-S
Matisse
Architecture
Base frecuency
3.7 GHz
3.6 GHz
Boost frecuency
4.7 GHz
4.4 GHz
Socket
LGA 1151
AM4
Cores/Threads
6/12
8/16
TDP
95 W
65 W
Cache L1 (d+i)
6x32+6x32 kB
8x32+8x32 kB
Cache L2
6x256 kB
8x512 kB
Cache L3
12288 kB
32768 kB
Date
October 2017
July 2019
Mean monothread perf.
80.6k points
74.41k points
Mean multithread perf.
443.77k points
482.11k points

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
3700X
Test#1 (Integers)
4.13k
4.42k (x1.07)
Test#2 (FP)
16.96k
19.3k (x1.14)
Test#3 (Generic, ZIP)
5.56k
8k (x1.44)
Test#1 (Memory)
12.85k
24.54k (x1.91)
TOTAL
39.5k
56.26k (x1.42)

Multithread

i7-8700k

3700X
Test#1 (Integers)
24.01k
33.79k (x1.41)
Test#2 (FP)
108.69k
167.76k (x1.54)
Test#3 (Generic, ZIP)
36.62k
89.44k (x2.44)
Test#1 (Memory)
9.33k
9.55k (x1.02)
TOTAL
178.64k
300.54k (x1.68)

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
3700X
Test#1 (Integers)
31.2k
16.77k (x0.54)
Test#2 (FP)
27.82k
26.3k (x0.95)
Test#3 (Generic, ZIP)
6.57k
8.81k (x1.34)
Test#1 (Memory)
15k
22.53k (x1.5)
TOTAL
80.6k
74.41k (x0.92)

Multithread

i7-8700k

3700X
Test#1 (Integers)
202.42k
165.4k (x0.82)
Test#2 (FP)
186.33k
208.96k (x1.12)
Test#3 (Generic, ZIP)
44.96k
92.87k (x2.07)
Test#1 (Memory)
10.05k
14.87k (x1.48)
TOTAL
443.77k
482.11k (x1.09)

Performance/W
i7-8700k
3700X
Test#1 (Integers)
2131 points/W
2545 points/W
Test#2 (FP)
1961 points/W
3215 points/W
Test#3 (Generic, ZIP)
473 points/W
1429 points/W
Test#1 (Memory)
106 points/W
229 points/W
TOTAL
4671 points/W
7417 points/W

Performance/GHz
i7-8700k
3700X
Test#1 (Integers)
6639 points/GHz
3811 points/GHz
Test#2 (FP)
5919 points/GHz
5978 points/GHz
Test#3 (Generic, ZIP)
1397 points/GHz
2002 points/GHz
Test#1 (Memory)
3192 points/GHz
5120 points/GHz
TOTAL
17148 points/GHz
16911 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. 3.11.4