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Ryzen 9 3950X vs 3900


Description
Both models 3950X and 3900 are based on Zen 2 architecture.

Zen 2 is fabricated on the 7nm process from TSMC and it’s the third generation of Zen CPUs. It comes with 64kB of L1 cache and 512kB of L2 cache per core. Zen 2 CPUs are divided into 3 categories: Matisse (desktop), Rome (Server) and Castle Peak (high-end desktop).

Using the multithread performance as a reference, the 3950X gets a score of 959.8 k points while the 3900 gets 687.5 k points.

Summarizing, the 3950X is 1.4 times faster than the 3900. To get a proper comparison between both models, take a look to the data shown below.

Specs
CPUID
870f10
870f10
Core
Matisse
Matisse
Architecture
Base frecuency
3.5 GHz
3.1 GHz
Boost frecuency
4.7 GHz
4.3 GHz
Socket
AM4
AM4
Cores/Threads
16/32
12/24
TDP
105 W
65 W
Cache L1 (d+i)
16x32+16x32 kB
12x32+12x32 kB
Cache L2
16x512 kB
12x512 kB
Cache L3
4x16384 kB
4x16384 kB
Date
November 2019
September 2019
Mean monothread perf.
72.95k points
74.97k points
Mean multithread perf.
959.77k points
687.5k 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
3950X
3900
Test#1 (Integers)
16.49k
16.85k (x1.02)
Test#2 (FP)
26.16k
26.03k (x0.99)
Test#3 (Generic, ZIP)
7.9k
9.54k (x1.21)
Test#1 (Memory)
22.4k
22.55k (x1.01)
TOTAL
72.95k
74.97k (x1.03)

Multithread

3950X

3900
Test#1 (Integers)
334.49k
229.41k (x0.69)
Test#2 (FP)
423.74k
292.81k (x0.69)
Test#3 (Generic, ZIP)
187.85k
128.48k (x0.68)
Test#1 (Memory)
13.69k
36.8k (x2.69)
TOTAL
959.77k
687.5k (x0.72)

Performance/W
3950X
3900
Test#1 (Integers)
3186 points/W
3529 points/W
Test#2 (FP)
4036 points/W
4505 points/W
Test#3 (Generic, ZIP)
1789 points/W
1977 points/W
Test#1 (Memory)
130 points/W
566 points/W
TOTAL
9141 points/W
10577 points/W

Performance/GHz
3950X
3900
Test#1 (Integers)
3509 points/GHz
3920 points/GHz
Test#2 (FP)
5566 points/GHz
6054 points/GHz
Test#3 (Generic, ZIP)
1681 points/GHz
2218 points/GHz
Test#1 (Memory)
4765 points/GHz
5243 points/GHz
TOTAL
15522 points/GHz
17435 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