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Core i9-9900K vs Ryzen 9 3900X


Description
The i9-9900K is based on Coffee Lake architecture while the 3900X is based on Zen 2.

Using the multithread performance as a reference, the i9-9900K gets a score of 545.3 k points while the 3900X gets 756.3 k points.

Summarizing, the 3900X is 1.4 times faster than the i9-9900K. 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
5 GHz
4.6 GHz
Socket
LGA 1151
AM4
Cores/Threads
8/16
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
16384 kB
4x16384 kB
Date
October 2018
July 2019
Mean monothread perf.
86.24k points
72.51k points
Mean multithread perf.
545.3k points
756.3k 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
i9-9900K
3900X
Test#1 (Integers)
5.17k
4.46k (x0.86)
Test#2 (FP)
21.15k
18.46k (x0.87)
Test#3 (Generic, ZIP)
7.01k
8.05k (x1.15)
Test#1 (Memory)
15.32k
23.71k (x1.55)
TOTAL
48.66k
54.68k (x1.12)

Multithread

i9-9900K

3900X
Test#1 (Integers)
38.45k
52.65k (x1.37)
Test#2 (FP)
155.68k
265.41k (x1.7)
Test#3 (Generic, ZIP)
51k
140.78k (x2.76)
Test#1 (Memory)
18.26k
46.91k (x2.57)
TOTAL
263.38k
505.76k (x1.92)

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
i9-9900K
3900X
Test#1 (Integers)
33.62k
16.73k (x0.5)
Test#2 (FP)
30.02k
24.74k (x0.82)
Test#3 (Generic, ZIP)
7.17k
8.82k (x1.23)
Test#1 (Memory)
15.43k
22.22k (x1.44)
TOTAL
86.24k
72.51k (x0.84)

Multithread

i9-9900K

3900X
Test#1 (Integers)
248.93k
248.24k (x1)
Test#2 (FP)
224.43k
309.66k (x1.38)
Test#3 (Generic, ZIP)
53.39k
140.01k (x2.62)
Test#1 (Memory)
18.54k
58.39k (x3.15)
TOTAL
545.3k
756.3k (x1.39)

Performance/W
i9-9900K
3900X
Test#1 (Integers)
2620 points/W
2364 points/W
Test#2 (FP)
2362 points/W
2949 points/W
Test#3 (Generic, ZIP)
562 points/W
1333 points/W
Test#1 (Memory)
195 points/W
556 points/W
TOTAL
5740 points/W
7203 points/W

Performance/GHz
i9-9900K
3900X
Test#1 (Integers)
6724 points/GHz
3638 points/GHz
Test#2 (FP)
6003 points/GHz
5377 points/GHz
Test#3 (Generic, ZIP)
1434 points/GHz
1917 points/GHz
Test#1 (Memory)
3087 points/GHz
4831 points/GHz
TOTAL
17247 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