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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 788.9 k points while the 3900X gets 756.3 k points.

Summarizing, the i9-11900K is 1 times faster than the 3900X. 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.
106.41k points
72.51k points
Mean multithread perf.
788.94k 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)
38.06k
16.73k (x0.44)
Test#2 (FP)
31.54k
24.74k (x0.78)
Test#3 (Generic, ZIP)
13.5k
8.82k (x0.65)
Test#1 (Memory)
23.3k
22.22k (x0.95)
TOTAL
106.41k
72.51k (x0.68)

Multithread

i9-11900K

3900X
Test#1 (Integers)
327.93k
248.24k (x0.76)
Test#2 (FP)
329.16k
309.66k (x0.94)
Test#3 (Generic, ZIP)
118.88k
140.01k (x1.18)
Test#1 (Memory)
12.98k
58.39k (x4.5)
TOTAL
788.94k
756.3k (x0.96)

Performance/W
i9-11900K
3900X
Test#1 (Integers)
2623 points/W
2364 points/W
Test#2 (FP)
2633 points/W
2949 points/W
Test#3 (Generic, ZIP)
951 points/W
1333 points/W
Test#1 (Memory)
104 points/W
556 points/W
TOTAL
6312 points/W
7203 points/W

Performance/GHz
i9-11900K
3900X
Test#1 (Integers)
7182 points/GHz
3638 points/GHz
Test#2 (FP)
5952 points/GHz
5377 points/GHz
Test#3 (Generic, ZIP)
2547 points/GHz
1917 points/GHz
Test#1 (Memory)
4397 points/GHz
4831 points/GHz
TOTAL
20077 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