Core i5-7400T vs i7-8650U
Description
Both models i5-7400T and i7-8650U are based on Kaby Lake architecture.
The first Kaby Lake CPU was released in August 2016. It uses a 14 nm process and was the first architecture in breaking the previous tick-tock model. Actually, it is not that different from the preceding Skylake: it has 64kB of L1 cache and 256kB L2 cache per core.
Using the multithread performance as a reference, the i5-7400T gets a score of 163.4 k points while the i7-8650U gets 173.5 k points.
Summarizing, the i7-8650U is 1.1 times faster than the i5-7400T. To get a proper comparison between both models, take a look to the data shown below.
The first Kaby Lake CPU was released in August 2016. It uses a 14 nm process and was the first architecture in breaking the previous tick-tock model. Actually, it is not that different from the preceding Skylake: it has 64kB of L1 cache and 256kB L2 cache per core.
Using the multithread performance as a reference, the i5-7400T gets a score of 163.4 k points while the i7-8650U gets 173.5 k points.
Summarizing, the i7-8650U is 1.1 times faster than the i5-7400T. To get a proper comparison between both models, take a look to the data shown below.
Specs
CPUID
906e9
806ea
Core
Kaby Lake-S
Kaby Lake-R
Base frecuency
2.4 GHz
1.9 GHz
Boost frecuency
3 GHz
4.2 GHz
Socket
LGA 1151
BGA 1356
Cores/Threads
4/4
4/8
TDP
35 W
15 W
Cache L1 (d+i)
4x32+4x32 kB
4x32+4x32 kB
Cache L2
4x256 kB
4x256 kB
Cache L3
6144 kB
8192 kB
Date
January 2017
August 2017
Mean monothread perf.
49.16k points
55.86k points
Mean multithread perf.
163.4k points
173.49k 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
i5-7400T
i7-8650U
Test#1 (Integers)
19.7k
21.61k (x1.1)
Test#2 (FP)
17.29k
19.69k (x1.14)
Test#3 (Generic, ZIP)
4.07k
4.61k (x1.13)
Test#1 (Memory)
8.1k
9.95k (x1.23)
TOTAL
49.16k
55.86k (x1.14)
Multithread
i5-7400T
i7-8650U
Test#1 (Integers)
75.27k
78.38k (x1.04)
Test#2 (FP)
66.24k
72.02k (x1.09)
Test#3 (Generic, ZIP)
13.93k
16.95k (x1.22)
Test#1 (Memory)
7.95k
6.15k (x0.77)
TOTAL
163.4k
173.49k (x1.06)
Performance/W
i5-7400T
i7-8650U
Test#1 (Integers)
2151 points/W
5225 points/W
Test#2 (FP)
1893 points/W
4802 points/W
Test#3 (Generic, ZIP)
398 points/W
1130 points/W
Test#1 (Memory)
227 points/W
410 points/W
TOTAL
4669 points/W
11566 points/W
Performance/GHz
i5-7400T
i7-8650U
Test#1 (Integers)
6568 points/GHz
5146 points/GHz
Test#2 (FP)
5764 points/GHz
4689 points/GHz
Test#3 (Generic, ZIP)
1356 points/GHz
1097 points/GHz
Test#1 (Memory)
2700 points/GHz
2368 points/GHz
TOTAL
16388 points/GHz
13300 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