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Ryzen 7 3800XT vs Core i5-8400


Description
The 3800XT is based on Zen 2 architecture while the i5-8400 is based on Coffee Lake.

Using the multithread performance as a reference, the 3800XT gets a score of 508.9 k points while the i5-8400 gets 289.6 k points.

Summarizing, the 3800XT is 1.8 times faster than the i5-8400. To get a proper comparison between both models, take a look to the data shown below.

Specs
CPUID
870f10
906ea
Core
Matisse
Coffee Lake-S
Architecture
Base frecuency
3.9 GHz
2.8 GHz
Boost frecuency
4.7 GHz
4 GHz
Socket
AM4
LGA 1151
Cores/Threads
8/16
6/6
TDP
105 W
65 W
Cache L1 (d+i)
8x32+8x32 kB
6x32+6x32 kB
Cache L2
8x512 kB
6x256 kB
Cache L3
2x16384 kB
9216 kB
Date
July 2020
September 2017
Mean monothread perf.
78.2k points
64.98k points
Mean multithread perf.
508.89k points
289.61k 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
i5-8400
Test#1 (Integers)
17.57k
26.5k (x1.51)
Test#2 (FP)
27.38k
23.11k (x0.84)
Test#3 (Generic, ZIP)
9.35k
5.2k (x0.56)
Test#1 (Memory)
23.9k
10.16k (x0.43)
TOTAL
78.2k
64.98k (x0.83)

Multithread

3800XT

i5-8400
Test#1 (Integers)
176.08k
135.08k (x0.77)
Test#2 (FP)
219.88k
121.49k (x0.55)
Test#3 (Generic, ZIP)
100k
27.53k (x0.28)
Test#1 (Memory)
12.93k
5.5k (x0.43)
TOTAL
508.89k
289.61k (x0.57)

Performance/W
3800XT
i5-8400
Test#1 (Integers)
1677 points/W
2078 points/W
Test#2 (FP)
2094 points/W
1869 points/W
Test#3 (Generic, ZIP)
952 points/W
424 points/W
Test#1 (Memory)
123 points/W
85 points/W
TOTAL
4847 points/W
4455 points/W

Performance/GHz
3800XT
i5-8400
Test#1 (Integers)
3738 points/GHz
6626 points/GHz
Test#2 (FP)
5827 points/GHz
5778 points/GHz
Test#3 (Generic, ZIP)
1989 points/GHz
1300 points/GHz
Test#1 (Memory)
5085 points/GHz
2541 points/GHz
TOTAL
16638 points/GHz
16245 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