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Ryzen 7 3800XT vs Ryzen 9 3900X


Description
Both models 3800XT and 3900X 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 3800XT gets a score of 508.9 k points while the 3900X gets 756.3 k points.

Summarizing, the 3900X 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
870f10
870f10
Core
Matisse
Matisse
Architecture
Base frecuency
3.9 GHz
3.8 GHz
Boost frecuency
4.7 GHz
4.6 GHz
Socket
AM4
AM4
Cores/Threads
8/16
12/24
TDP
105 W
105 W
Cache L1 (d+i)
8x32+8x32 kB
12x32+12x32 kB
Cache L2
8x512 kB
12x512 kB
Cache L3
2x16384 kB
4x16384 kB
Date
July 2020
July 2019
Mean monothread perf.
78.2k points
72.51k points
Mean multithread perf.
508.89k 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
3800XT
3900X
Test#1 (Integers)
17.57k
16.73k (x0.95)
Test#2 (FP)
27.38k
24.74k (x0.9)
Test#3 (Generic, ZIP)
9.35k
8.82k (x0.94)
Test#1 (Memory)
23.9k
22.22k (x0.93)
TOTAL
78.2k
72.51k (x0.93)

Multithread

3800XT

3900X
Test#1 (Integers)
176.08k
248.24k (x1.41)
Test#2 (FP)
219.88k
309.66k (x1.41)
Test#3 (Generic, ZIP)
100k
140.01k (x1.4)
Test#1 (Memory)
12.93k
58.39k (x4.52)
TOTAL
508.89k
756.3k (x1.49)

Performance/W
3800XT
3900X
Test#1 (Integers)
1677 points/W
2364 points/W
Test#2 (FP)
2094 points/W
2949 points/W
Test#3 (Generic, ZIP)
952 points/W
1333 points/W
Test#1 (Memory)
123 points/W
556 points/W
TOTAL
4847 points/W
7203 points/W

Performance/GHz
3800XT
3900X
Test#1 (Integers)
3738 points/GHz
3638 points/GHz
Test#2 (FP)
5827 points/GHz
5377 points/GHz
Test#3 (Generic, ZIP)
1989 points/GHz
1917 points/GHz
Test#1 (Memory)
5085 points/GHz
4831 points/GHz
TOTAL
16638 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