Core i5-9500T vs i5-8400
Description
Both models i5-9500T and i5-8400 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 i5-9500T gets a score of 274 k points while the i5-8400 gets 289.6 k points.
Summarizing, the i5-8400 is 1.1 times faster than the i5-9500T. To get a proper comparison between both models, take a look to the data shown below.
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 i5-9500T gets a score of 274 k points while the i5-8400 gets 289.6 k points.
Summarizing, the i5-8400 is 1.1 times faster than the i5-9500T. To get a proper comparison between both models, take a look to the data shown below.
Specs
CPUID
906ea
906ea
Core
Coffee Lake-S
Coffee Lake-S
Base frecuency
2.2 GHz
2.8 GHz
Boost frecuency
3.7 GHz
4 GHz
Socket
LGA 1151
LGA 1151
Cores/Threads
6/6
6/6
TDP
35 W
65 W
Cache L1 (d+i)
6x32+6x32 kB
6x32+6x32 kB
Cache L2
6x256 kB
6x256 kB
Cache L3
9216 kB
9216 kB
Date
July 2019
September 2017
Mean monothread perf.
61.46k points
64.98k points
Mean multithread perf.
274.02k points
289.61k points
Non-optimized benchmark
The benchmark in Mode 0 (FPU) measures cpu performance with non-optimized software. It uses the basic µinstructions from the i386 architecture with the i387 floating point unit. This mode is compatible with all CPUs so it's practical to compare very different CPUs
Monothread
i5-9500T
i5-8400
Test#1 (Integers)
3.73k
4.08k (x1.09)
Test#2 (FP)
15.41k
14.96k (x0.97)
Test#3 (Generic, ZIP)
4.62k
4.98k (x1.08)
Test#1 (Memory)
10.59k
10.29k (x0.97)
TOTAL
34.35k
34.31k (x1)
Multithread
i5-9500T
i5-8400
Test#1 (Integers)
20.82k
21.54k (x1.03)
Test#2 (FP)
85.48k
85.13k (x1)
Test#3 (Generic, ZIP)
23.21k
28.24k (x1.22)
Test#1 (Memory)
4.11k
4.08k (x0.99)
TOTAL
133.63k
139k (x1.04)
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
i5-9500T
i5-8400
Test#1 (Integers)
24.5k
26.5k (x1.08)
Test#2 (FP)
21.41k
23.11k (x1.08)
Test#3 (Generic, ZIP)
4.82k
5.2k (x1.08)
Test#1 (Memory)
10.73k
10.16k (x0.95)
TOTAL
61.46k
64.98k (x1.06)
Multithread
i5-9500T
i5-8400
Test#1 (Integers)
134.63k
135.08k (x1)
Test#2 (FP)
113.61k
121.49k (x1.07)
Test#3 (Generic, ZIP)
21.71k
27.53k (x1.27)
Test#1 (Memory)
4.07k
5.5k (x1.35)
TOTAL
274.02k
289.61k (x1.06)
Performance/W
i5-9500T
i5-8400
Test#1 (Integers)
3846 points/W
2078 points/W
Test#2 (FP)
3246 points/W
1869 points/W
Test#3 (Generic, ZIP)
620 points/W
424 points/W
Test#1 (Memory)
116 points/W
85 points/W
TOTAL
7829 points/W
4455 points/W
Performance/GHz
i5-9500T
i5-8400
Test#1 (Integers)
6621 points/GHz
6626 points/GHz
Test#2 (FP)
5786 points/GHz
5778 points/GHz
Test#3 (Generic, ZIP)
1302 points/GHz
1300 points/GHz
Test#1 (Memory)
2901 points/GHz
2541 points/GHz
TOTAL
16610 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.
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]
Test#2 (FP) [points vs time]
Test#3 (Generic, ZIP) [points vs time]
Test#1 (Memory) [points vs time]
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.
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]
Test#2 (FP) [points vs time]
Test#3 (Generic, ZIP) [points vs time]
Test#1 (Memory) [points vs time]
Hardlimit Benchmark Central - Ver. 3.11.4