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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 959.8 k points.

Summarizing, the 3950X is 2.2 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
Mean monothread perf.
80.6k points
72.95k points
Mean multithread perf.
443.77k points
959.77k points

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)
31.2k
16.49k (x0.53)
Test#2 (FP)
27.82k
26.16k (x0.94)
Test#3 (Generic, ZIP)
6.57k
7.9k (x1.2)
Test#1 (Memory)
15k
22.4k (x1.49)
TOTAL
80.6k
72.95k (x0.91)

Multithread

i7-8700k

3950X
Test#1 (Integers)
202.42k
334.49k (x1.65)
Test#2 (FP)
186.33k
423.74k (x2.27)
Test#3 (Generic, ZIP)
44.96k
187.85k (x4.18)
Test#1 (Memory)
10.05k
13.69k (x1.36)
TOTAL
443.77k
959.77k (x2.16)

Performance/W
i7-8700k
3950X
Test#1 (Integers)
2131 points/W
3186 points/W
Test#2 (FP)
1961 points/W
4036 points/W
Test#3 (Generic, ZIP)
473 points/W
1789 points/W
Test#1 (Memory)
106 points/W
130 points/W
TOTAL
4671 points/W
9141 points/W

Performance/GHz
i7-8700k
3950X
Test#1 (Integers)
6639 points/GHz
3509 points/GHz
Test#2 (FP)
5919 points/GHz
5566 points/GHz
Test#3 (Generic, ZIP)
1397 points/GHz
1681 points/GHz
Test#1 (Memory)
3192 points/GHz
4765 points/GHz
TOTAL
17148 points/GHz
15522 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