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Ryzen 9 7940HS vs 3900


Description
The 7940HS is based on Zen 4 architecture while the 3900 is based on Zen 2.

Using the multithread performance as a reference, the 7940HS gets a score of 718.6 k points while the 3900 gets 687.5 k points.

Summarizing, the 7940HS is 1 times faster than the 3900. To get a proper comparison between both models, take a look to the data shown below.

Specs
CPUID
a70f41
870f10
Core
Phoenix
Matisse
Architecture
Zen 4
Base frecuency
4 GHz
3.1 GHz
Boost frecuency
5.2 GHz
4.3 GHz
Socket
BGA-FP7r2
AM4
Cores/Threads
8/16
12/24
TDP
35 W
65 W
Cache L1 (d+i)
8x32+8x32 kB
12x32+12x32 kB
Cache L2
8x1024 kB
12x512 kB
Cache L3
16384 kB
4x16384 kB
Date
March 2023
September 2019
Mean monothread perf.
113.57k points
74.97k points
Mean multithread perf.
718.59k 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
7940HS
3900
Test#1 (Integers)
38.25k
16.85k (x0.44)
Test#2 (FP)
29.92k
26.03k (x0.87)
Test#3 (Generic, ZIP)
15.5k
9.54k (x0.62)
Test#1 (Memory)
29.89k
22.55k (x0.75)
TOTAL
113.57k
74.97k (x0.66)

Multithread

7940HS

3900
Test#1 (Integers)
309.6k
229.41k (x0.74)
Test#2 (FP)
260.4k
292.81k (x1.12)
Test#3 (Generic, ZIP)
128.56k
128.48k (x1)
Test#1 (Memory)
20.04k
36.8k (x1.84)
TOTAL
718.59k
687.5k (x0.96)

Performance/W
7940HS
3900
Test#1 (Integers)
8846 points/W
3529 points/W
Test#2 (FP)
7440 points/W
4505 points/W
Test#3 (Generic, ZIP)
3673 points/W
1977 points/W
Test#1 (Memory)
573 points/W
566 points/W
TOTAL
20531 points/W
10577 points/W

Performance/GHz
7940HS
3900
Test#1 (Integers)
7355 points/GHz
3920 points/GHz
Test#2 (FP)
5755 points/GHz
6054 points/GHz
Test#3 (Generic, ZIP)
2981 points/GHz
2218 points/GHz
Test#1 (Memory)
5748 points/GHz
5243 points/GHz
TOTAL
21839 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