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Ryzen 9 3950X vs Ryzen 7 3800XT


Description
Both models 3950X and 3800XT 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 3800XT gets 508.9 k points.

Summarizing, the 3950X is 1.9 times faster than the 3800XT. 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
3.9 GHz
Boost frecuency
4.7 GHz
4.7 GHz
Socket
AM4
AM4
Cores/Threads
16/32
8/16
TDP
105 W
105 W
Cache L1 (d+i)
16x32+16x32 kB
8x32+8x32 kB
Cache L2
16x512 kB
8x512 kB
Cache L3
4x16384 kB
2x16384 kB
Date
November 2019
July 2020
Mean monothread perf.
72.95k points
78.2k points
Mean multithread perf.
959.77k 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
3950X
3800XT
Test#1 (Integers)
16.49k
17.57k (x1.07)
Test#2 (FP)
26.16k
27.38k (x1.05)
Test#3 (Generic, ZIP)
7.9k
9.35k (x1.18)
Test#1 (Memory)
22.4k
23.9k (x1.07)
TOTAL
72.95k
78.2k (x1.07)

Multithread

3950X

3800XT
Test#1 (Integers)
334.49k
176.08k (x0.53)
Test#2 (FP)
423.74k
219.88k (x0.52)
Test#3 (Generic, ZIP)
187.85k
100k (x0.53)
Test#1 (Memory)
13.69k
12.93k (x0.94)
TOTAL
959.77k
508.89k (x0.53)

Performance/W
3950X
3800XT
Test#1 (Integers)
3186 points/W
1677 points/W
Test#2 (FP)
4036 points/W
2094 points/W
Test#3 (Generic, ZIP)
1789 points/W
952 points/W
Test#1 (Memory)
130 points/W
123 points/W
TOTAL
9141 points/W
4847 points/W

Performance/GHz
3950X
3800XT
Test#1 (Integers)
3509 points/GHz
3738 points/GHz
Test#2 (FP)
5566 points/GHz
5827 points/GHz
Test#3 (Generic, ZIP)
1681 points/GHz
1989 points/GHz
Test#1 (Memory)
4765 points/GHz
5085 points/GHz
TOTAL
15522 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