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Core i5-9400F vs i3-8350K


Description
Both models i5-9400F and i3-8350K are based on Coffee Lake architecture.

Coffee Lake is the second refinement of Intel’s 14nm (Tri-Gate) technology. While it uses LGA1151 socket, it is incompatible with previous generations due to electrical changes in socket’s pins so these CPUs require Z370 chipset. This kind of generation introduced more cores in every range to compete with new AMD’s architecture. Coffee Lake uses DDR4 memory at 2400MHz for i3 and at 2666MHz for i5, i7 CPUs plus iGPU frequency has been increased 50MHz with respect to previous generation.

Using the multithread performance as a reference, the i5-9400F gets a score of 331.2 k points while the i3-8350K gets 237.6 k points.

Summarizing, the i5-9400F is 1.4 times faster than the i3-8350K. To get a proper comparison between both models, take a look to the data shown below.

Specs
CPUID
906ea
906eb
Core
Coffee Lake-S
Coffee Lake-S
Architecture
Base frecuency
2.9 GHz
4 GHz
Boost frecuency
4.1 GHz
4 GHz
Socket
LGA 1151
LGA 1151
Cores/Threads
6/6
4/4
TDP
65 W
91 W
Cache L1 (d+i)
6x32+6x32 kB
4x32+4x32 kB
Cache L2
6x256 kB
4x256 kB
Cache L3
9216 kB
8192 kB
Date
January 2019
October 2017
Mean monothread perf.
67.77k points
68.36k points
Mean multithread perf.
331.19k points
237.63k 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
i5-9400F
i3-8350K
Test#1 (Integers)
27.15k
27.29k (x1.01)
Test#2 (FP)
23.63k
24.19k (x1.02)
Test#3 (Generic, ZIP)
5.38k
5.75k (x1.07)
Test#1 (Memory)
11.61k
11.13k (x0.96)
TOTAL
67.77k
68.36k (x1.01)

Multithread

i5-9400F

i3-8350K
Test#1 (Integers)
156.61k
107.78k (x0.69)
Test#2 (FP)
138k
95.93k (x0.7)
Test#3 (Generic, ZIP)
29.45k
22.65k (x0.77)
Test#1 (Memory)
7.14k
11.26k (x1.58)
TOTAL
331.19k
237.63k (x0.72)

Performance/W
i5-9400F
i3-8350K
Test#1 (Integers)
2409 points/W
1184 points/W
Test#2 (FP)
2123 points/W
1054 points/W
Test#3 (Generic, ZIP)
453 points/W
249 points/W
Test#1 (Memory)
110 points/W
124 points/W
TOTAL
5095 points/W
2611 points/W

Performance/GHz
i5-9400F
i3-8350K
Test#1 (Integers)
6622 points/GHz
6823 points/GHz
Test#2 (FP)
5763 points/GHz
6048 points/GHz
Test#3 (Generic, ZIP)
1312 points/GHz
1436 points/GHz
Test#1 (Memory)
2831 points/GHz
2784 points/GHz
TOTAL
16528 points/GHz
17091 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