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Core i7-9700K vs Ryzen 9 3900X


Description
The i7-9700K is based on Coffee Lake architecture while the 3900X is based on Zen 2.

Using the multithread performance as a reference, the i7-9700K gets a score of 460 k points while the 3900X gets 756.3 k points.

Summarizing, the 3900X is 1.6 times faster than the i7-9700K. To get a proper comparison between both models, take a look to the data shown below.

Specs
CPUID
906ec
870f10
Core
Coffee Lake-S
Matisse
Architecture
Base frecuency
3.6 GHz
3.8 GHz
Boost frecuency
4.9 GHz
4.6 GHz
Socket
LGA 1151
AM4
Cores/Threads
8/8
12/24
TDP
95 W
105 W
Cache L1 (d+i)
8x32+8x32 kB
12x32+12x32 kB
Cache L2
8x256 kB
12x512 kB
Cache L3
12288 kB
4x16384 kB
Date
October 2018
July 2019
Mean monothread perf.
73.62k points
72.51k points
Mean multithread perf.
460.02k points
756.3k 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
i7-9700K
3900X
Test#1 (Integers)
29.3k
16.73k (x0.57)
Test#2 (FP)
25.61k
24.74k (x0.97)
Test#3 (Generic, ZIP)
5.86k
8.82k (x1.51)
Test#1 (Memory)
12.86k
22.22k (x1.73)
TOTAL
73.62k
72.51k (x0.98)

Multithread

i7-9700K

3900X
Test#1 (Integers)
217.77k
248.24k (x1.14)
Test#2 (FP)
190.46k
309.66k (x1.63)
Test#3 (Generic, ZIP)
40.48k
140.01k (x3.46)
Test#1 (Memory)
11.31k
58.39k (x5.17)
TOTAL
460.02k
756.3k (x1.64)

Performance/W
i7-9700K
3900X
Test#1 (Integers)
2292 points/W
2364 points/W
Test#2 (FP)
2005 points/W
2949 points/W
Test#3 (Generic, ZIP)
426 points/W
1333 points/W
Test#1 (Memory)
119 points/W
556 points/W
TOTAL
4842 points/W
7203 points/W

Performance/GHz
i7-9700K
3900X
Test#1 (Integers)
5981 points/GHz
3638 points/GHz
Test#2 (FP)
5226 points/GHz
5377 points/GHz
Test#3 (Generic, ZIP)
1195 points/GHz
1917 points/GHz
Test#1 (Memory)
2624 points/GHz
4831 points/GHz
TOTAL
15025 points/GHz
15763 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