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Core i9-12900KF vs Ryzen 9 3950X


Description
The i9-12900KF is based on Alder Lake architecture while the 3950X is based on Zen 2.

Using the multithread performance as a reference, the i9-12900KF gets a score of 1219.3 k points while the 3950X gets 959.8 k points.

Summarizing, the i9-12900KF is 1.3 times faster than the 3950X. To get a proper comparison between both models, take a look to the data shown below.

Specs
CPUID
90672
870f10
Core
Alder Lake-S
Matisse
Architecture
Base frecuency
3.2 GHz
3.5 GHz
Boost frecuency
5.2 GHz
4.7 GHz
Socket
LGA 1700
AM4
Cores/Threads
16/24
16/32
TDP
125 W
105 W
Cache L1 (d+i)
8x32/8x64+8x48/8x32 kB
16x32+16x32 kB
Cache L2
8x1280+8x2048 kB
16x512 kB
Cache L3
30720 kB
4x16384 kB
Date
November 2021
November 2019
Mean monothread perf.
120.97k points
72.95k points
Mean multithread perf.
1219.33k points
959.77k 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
i9-12900KF
3950X
Test#1 (Integers)
57.05k
16.49k (x0.29)
Test#2 (FP)
29.66k
26.16k (x0.88)
Test#3 (Generic, ZIP)
16.48k
7.9k (x0.48)
Test#1 (Memory)
17.78k
22.4k (x1.26)
TOTAL
120.97k
72.95k (x0.6)

Multithread

i9-12900KF

3950X
Test#1 (Integers)
546.04k
334.49k (x0.61)
Test#2 (FP)
437.01k
423.74k (x0.97)
Test#3 (Generic, ZIP)
211.36k
187.85k (x0.89)
Test#1 (Memory)
24.92k
13.69k (x0.55)
TOTAL
1219.33k
959.77k (x0.79)

Performance/W
i9-12900KF
3950X
Test#1 (Integers)
4368 points/W
3186 points/W
Test#2 (FP)
3496 points/W
4036 points/W
Test#3 (Generic, ZIP)
1691 points/W
1789 points/W
Test#1 (Memory)
199 points/W
130 points/W
TOTAL
9755 points/W
9141 points/W

Performance/GHz
i9-12900KF
3950X
Test#1 (Integers)
10972 points/GHz
3509 points/GHz
Test#2 (FP)
5704 points/GHz
5566 points/GHz
Test#3 (Generic, ZIP)
3170 points/GHz
1681 points/GHz
Test#1 (Memory)
3419 points/GHz
4765 points/GHz
TOTAL
23264 points/GHz
15522 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