| | | |

Core i7-8700k vs Ryzen 9 3900X


Description
The i7-8700k is based on Coffee Lake architecture while the 3900X 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 3900X gets 753.5 k points.

Summarizing, the 3900X is 1.7 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
3.8 GHz
Boost frecuency
4.7 GHz
4.6 GHz
Socket
LGA 1151
AM4
Cores/Threads
6/12
12/24
TDP
95 W
105 W
Cache L1 (d+i)
6x32+6x32 kB
12x32+12x32 kB
Cache L2
6x256 kB
12x512 kB
Cache L3
12288 kB
4x16384 kB
Date
October 2017
July 2019

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
3900X
Test#1 (Integers)
31204
16398 (-47.45%)
Test#2 (FP)
27821
23948 (-13.92%)
Test#3 (Generic, ZIP)
6568
8578 (30.61%)
Test#1 (Memory)
15004
22186 (47.86%)
TOTAL
80598
71110 (-11.77%)

Multithread

i7-8700k

3900X
Test#1 (Integers)
202422
238371 (17.76%)
Test#2 (FP)
186332
299559 (60.77%)
Test#3 (Generic, ZIP)
44958
134383 (198.91%)
Test#1 (Memory)
10054
81218 (707.85%)
TOTAL
443765
753531 (69.80%)

Performance/W
i7-8700k
3900X
Test#1 (Integers)
2131 points/W
2270 points/W
Test#2 (FP)
1961 points/W
2853 points/W
Test#3 (Generic, ZIP)
473 points/W
1280 points/W
Test#1 (Memory)
106 points/W
774 points/W
TOTAL
4671 points/W
7176 points/W

Performance/GHz
i7-8700k
3900X
Test#1 (Integers)
6639 points/GHz
3565 points/GHz
Test#2 (FP)
5919 points/GHz
5206 points/GHz
Test#3 (Generic, ZIP)
1397 points/GHz
1865 points/GHz
Test#1 (Memory)
3192 points/GHz
4823 points/GHz
TOTAL
17148 points/GHz
15459 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