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Core i9-11900K vs Ryzen 9 3900X


Description
The i9-11900K is based on Rocket Lake architecture while the 3900X is based on Zen 2.

Using the multithread performance as a reference, the i9-11900K gets a score of 748 k points while the 3900X gets 756.3 k points.

Summarizing, the 3900X is 1 times faster than the i9-11900K. To get a proper comparison between both models, take a look to the data shown below.

Specs
CPUID
a0671
870f10
Core
Rocket Lake-S
Matisse
Architecture
Base frecuency
3.5 GHz
3.8 GHz
Boost frecuency
5.3 GHz
4.6 GHz
Socket
LGA 1200
AM4
Cores/Threads
8/16
12/24
TDP
125 W
105 W
Cache L1 (d+i)
8x32+8x48 kB
12x32+12x32 kB
Cache L2
8x512 kB
12x512 kB
Cache L3
16386 kB
4x16384 kB
Date
March 2021
July 2019
Mean monothread perf.
101.11k points
72.51k points
Mean multithread perf.
748.02k 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
i9-11900K
3900X
Test#1 (Integers)
36.08k
16.73k (x0.46)
Test#2 (FP)
30.19k
24.74k (x0.82)
Test#3 (Generic, ZIP)
12.96k
8.82k (x0.68)
Test#1 (Memory)
21.88k
22.22k (x1.02)
TOTAL
101.11k
72.51k (x0.72)

Multithread

i9-11900K

3900X
Test#1 (Integers)
311.76k
248.24k (x0.8)
Test#2 (FP)
314.01k
309.66k (x0.99)
Test#3 (Generic, ZIP)
112.23k
140.01k (x1.25)
Test#1 (Memory)
10.02k
58.39k (x5.82)
TOTAL
748.02k
756.3k (x1.01)

Performance/W
i9-11900K
3900X
Test#1 (Integers)
2494 points/W
2364 points/W
Test#2 (FP)
2512 points/W
2949 points/W
Test#3 (Generic, ZIP)
898 points/W
1333 points/W
Test#1 (Memory)
80 points/W
556 points/W
TOTAL
5984 points/W
7203 points/W

Performance/GHz
i9-11900K
3900X
Test#1 (Integers)
6807 points/GHz
3638 points/GHz
Test#2 (FP)
5695 points/GHz
5377 points/GHz
Test#3 (Generic, ZIP)
2446 points/GHz
1917 points/GHz
Test#1 (Memory)
4129 points/GHz
4831 points/GHz
TOTAL
19077 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