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Ryzen 9 3900 vs Ryzen 7 7700X


Description
The 3900 is based on Zen 2 architecture while the 7700X is based on Zen 4.

Using the multithread performance as a reference, the 3900 gets a score of 687.5 k points while the 7700X gets 752.6 k points.

Summarizing, the 7700X is 1.1 times faster than the 3900. To get a proper comparison between both models, take a look to the data shown below.

Specs
CPUID
870f10
a60f12
Core
Matisse
Raphael
Architecture
Zen 2
Base frecuency
3.1 GHz
4.5 GHz
Boost frecuency
4.3 GHz
5.4 GHz
Socket
AM4
AM5
Cores/Threads
12/24
8/16
TDP
65 W
105 W
Cache L1 (d+i)
12x32+12x32 kB
8x32+8x32 kB
Cache L2
12x512 kB
8x1024 kB
Cache L3
4x16384 kB
32768 kB
Date
September 2019
September 2022
Mean monothread perf.
74.97k points
115.23k points
Mean multithread perf.
687.5k points
752.57k 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
3900
7700X
Test#1 (Integers)
16.85k
38.8k (x2.3)
Test#2 (FP)
26.03k
30.25k (x1.16)
Test#3 (Generic, ZIP)
9.54k
15.58k (x1.63)
Test#1 (Memory)
22.55k
30.59k (x1.36)
TOTAL
74.97k
115.23k (x1.54)

Multithread

3900

7700X
Test#1 (Integers)
229.41k
307.13k (x1.34)
Test#2 (FP)
292.81k
261.07k (x0.89)
Test#3 (Generic, ZIP)
128.48k
133.91k (x1.04)
Test#1 (Memory)
36.8k
50.47k (x1.37)
TOTAL
687.5k
752.57k (x1.09)

Performance/W
3900
7700X
Test#1 (Integers)
3529 points/W
2925 points/W
Test#2 (FP)
4505 points/W
2486 points/W
Test#3 (Generic, ZIP)
1977 points/W
1275 points/W
Test#1 (Memory)
566 points/W
481 points/W
TOTAL
10577 points/W
7167 points/W

Performance/GHz
3900
7700X
Test#1 (Integers)
3920 points/GHz
7186 points/GHz
Test#2 (FP)
6054 points/GHz
5603 points/GHz
Test#3 (Generic, ZIP)
2218 points/GHz
2885 points/GHz
Test#1 (Memory)
5243 points/GHz
5665 points/GHz
TOTAL
17435 points/GHz
21338 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