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Ryzen 9 5900X vs 7945HX


Description
The 5900X is based on Zen 3 architecture while the 7945HX is based on Zen 4.

Using the multithread performance as a reference, the 5900X gets a score of 840.1 k points while the 7945HX gets 1313.9 k points.

Summarizing, the 7945HX is 1.6 times faster than the 5900X. To get a proper comparison between both models, take a look to the data shown below.

Specs
CPUID
a20f10
a60f12
Core
Vermeer
Dragon Range
Architecture
Zen 3
Base frecuency
3.7 GHz
2.5 GHz
Boost frecuency
4.8 GHz
5.4 GHz
Socket
AM4
BGA-FL1
Cores/Threads
12/24
16/32
TDP
105 W
55 W
Cache L1 (d+i)
12x32+12x32 kB
16x32+16x32 kB
Cache L2
12x512 kB
16x1024 kB
Cache L3
2x32768 kB
65536 kB
Date
November 2020
January 2023
Mean monothread perf.
89.82k points
113.07k points
Mean multithread perf.
840.11k points
1313.94k 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
5900X
7945HX
Test#1 (Integers)
24.34k
37.43k (x1.54)
Test#2 (FP)
26.8k
30.7k (x1.15)
Test#3 (Generic, ZIP)
12.12k
15.16k (x1.25)
Test#1 (Memory)
26.55k
29.78k (x1.12)
TOTAL
89.82k
113.07k (x1.26)

Multithread

5900X

7945HX
Test#1 (Integers)
263.12k
556.68k (x2.12)
Test#2 (FP)
353.9k
482.32k (x1.36)
Test#3 (Generic, ZIP)
159.07k
225.46k (x1.42)
Test#1 (Memory)
64.01k
49.48k (x0.77)
TOTAL
840.11k
1313.94k (x1.56)

Performance/W
5900X
7945HX
Test#1 (Integers)
2506 points/W
10121 points/W
Test#2 (FP)
3371 points/W
8770 points/W
Test#3 (Generic, ZIP)
1515 points/W
4099 points/W
Test#1 (Memory)
610 points/W
900 points/W
TOTAL
8001 points/W
23890 points/W

Performance/GHz
5900X
7945HX
Test#1 (Integers)
5071 points/GHz
6932 points/GHz
Test#2 (FP)
5584 points/GHz
5685 points/GHz
Test#3 (Generic, ZIP)
2526 points/GHz
2807 points/GHz
Test#1 (Memory)
5530 points/GHz
5515 points/GHz
TOTAL
18712 points/GHz
20939 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