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Core i9-11900K vs Ryzen 7 3800XT


Description
The i9-11900K is based on Rocket Lake architecture while the 3800XT is based on Zen 2.

Using the multithread performance as a reference, the i9-11900K gets a score of 748 k points while the 3800XT gets 508.9 k points.

Summarizing, the i9-11900K is 1.5 times faster than the 3800XT. 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
3.9 GHz
Boost frecuency
5.3 GHz
4.7 GHz
Socket
LGA 1200
AM4
Cores/Threads
8/16
8/16
TDP
125 W
105 W
Cache L1 (d+i)
8x32+8x48 kB
8x32+8x32 kB
Cache L2
8x512 kB
8x512 kB
Cache L3
16386 kB
2x16384 kB
Date
March 2021
July 2020
Mean monothread perf.
101.11k points
78.2k points
Mean multithread perf.
748.02k points
508.89k 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
3800XT
Test#1 (Integers)
36.08k
17.57k (x0.49)
Test#2 (FP)
30.19k
27.38k (x0.91)
Test#3 (Generic, ZIP)
12.96k
9.35k (x0.72)
Test#1 (Memory)
21.88k
23.9k (x1.09)
TOTAL
101.11k
78.2k (x0.77)

Multithread

i9-11900K

3800XT
Test#1 (Integers)
311.76k
176.08k (x0.56)
Test#2 (FP)
314.01k
219.88k (x0.7)
Test#3 (Generic, ZIP)
112.23k
100k (x0.89)
Test#1 (Memory)
10.02k
12.93k (x1.29)
TOTAL
748.02k
508.89k (x0.68)

Performance/W
i9-11900K
3800XT
Test#1 (Integers)
2494 points/W
1677 points/W
Test#2 (FP)
2512 points/W
2094 points/W
Test#3 (Generic, ZIP)
898 points/W
952 points/W
Test#1 (Memory)
80 points/W
123 points/W
TOTAL
5984 points/W
4847 points/W

Performance/GHz
i9-11900K
3800XT
Test#1 (Integers)
6807 points/GHz
3738 points/GHz
Test#2 (FP)
5695 points/GHz
5827 points/GHz
Test#3 (Generic, ZIP)
2446 points/GHz
1989 points/GHz
Test#1 (Memory)
4129 points/GHz
5085 points/GHz
TOTAL
19077 points/GHz
16638 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