Core i7-7820HQ vs i5-7400T
Description
Both models i7-7820HQ and i5-7400T 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 i7-7820HQ gets a score of 196.6 k points while the i5-7400T gets 163.4 k points.
Summarizing, the i7-7820HQ is 1.2 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 i7-7820HQ gets a score of 196.6 k points while the i5-7400T gets 163.4 k points.
Summarizing, the i7-7820HQ is 1.2 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
906e9
Core
Kaby Lake-H
Kaby Lake-S
Base frecuency
2.9 GHz
2.4 GHz
Boost frecuency
3.9 GHz
3 GHz
Socket
BGA 1440
LGA 1151
Cores/Threads
4/8
4/4
TDP
45 W
35 W
Cache L1 (d+i)
4x32+x4x32 kB
4x32+4x32 kB
Cache L2
4x256 kB
4x256 kB
Cache L3
8192 kB
6144 kB
Date
January 2017
January 2017
Mean monothread perf.
55.85k points
49.16k points
Mean multithread perf.
196.55k points
163.4k 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
i7-7820HQ
i5-7400T
Test#1 (Integers)
23.23k
19.7k (x0.85)
Test#2 (FP)
20.13k
17.29k (x0.86)
Test#3 (Generic, ZIP)
4.57k
4.07k (x0.89)
Test#1 (Memory)
7.92k
8.1k (x1.02)
TOTAL
55.85k
49.16k (x0.88)
Multithread
i7-7820HQ
i5-7400T
Test#1 (Integers)
85.54k
75.27k (x0.88)
Test#2 (FP)
87.07k
66.24k (x0.76)
Test#3 (Generic, ZIP)
20.37k
13.93k (x0.68)
Test#1 (Memory)
3.57k
7.95k (x2.23)
TOTAL
196.55k
163.4k (x0.83)
Performance/W
i7-7820HQ
i5-7400T
Test#1 (Integers)
1901 points/W
2151 points/W
Test#2 (FP)
1935 points/W
1893 points/W
Test#3 (Generic, ZIP)
453 points/W
398 points/W
Test#1 (Memory)
79 points/W
227 points/W
TOTAL
4368 points/W
4669 points/W
Performance/GHz
i7-7820HQ
i5-7400T
Test#1 (Integers)
5956 points/GHz
6568 points/GHz
Test#2 (FP)
5163 points/GHz
5764 points/GHz
Test#3 (Generic, ZIP)
1172 points/GHz
1356 points/GHz
Test#1 (Memory)
2030 points/GHz
2700 points/GHz
TOTAL
14321 points/GHz
16388 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