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Core i7-8700k vs Ryzen 9 3950X


Description
The i7-8700k is based on Coffee Lake architecture while the 3950X 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 3950X gets 944.1 k points.

Summarizing, the 3950X is 2.1 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
3.5 GHz
Boost frecuency
4.7 GHz
4.7 GHz
Socket
LGA 1151
AM4
Cores/Threads
6/12
16/32
TDP
95 W
105 W
Cache L1 (d+i)
6x32+6x32 kB
16x32+16x32 kB
Cache L2
6x256 kB
16x512 kB
Cache L3
12288 kB
4x16384 kB
Date
October 2017
November 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
3950X
Test#1 (Integers)
31204
16951 (-45.68%)
Test#2 (FP)
27821
26801 (-3.67%)
Test#3 (Generic, ZIP)
6568
7939 (20.89%)
Test#1 (Memory)
15004
23136 (54.20%)
TOTAL
80598
74828 (-7.16%)

Multithread

i7-8700k

3950X
Test#1 (Integers)
202422
325542 (60.82%)
Test#2 (FP)
186332
421297 (126.10%)
Test#3 (Generic, ZIP)
44958
183022 (307.10%)
Test#1 (Memory)
10054
14205 (41.29%)
TOTAL
443765
944066 (112.74%)

Performance/W
i7-8700k
3950X
Test#1 (Integers)
2131 points/W
3100 points/W
Test#2 (FP)
1961 points/W
4012 points/W
Test#3 (Generic, ZIP)
473 points/W
1743 points/W
Test#1 (Memory)
106 points/W
135 points/W
TOTAL
4671 points/W
8991 points/W

Performance/GHz
i7-8700k
3950X
Test#1 (Integers)
6639 points/GHz
3607 points/GHz
Test#2 (FP)
5919 points/GHz
5702 points/GHz
Test#3 (Generic, ZIP)
1397 points/GHz
1689 points/GHz
Test#1 (Memory)
3192 points/GHz
4923 points/GHz
TOTAL
17148 points/GHz
15921 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