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Core i7-7500U vs i7-6820HQ


Description
The i7-7500U is based on Kaby Lake architecture while the i7-6820HQ is based on Skylake.

Using the multithread performance as a reference, the i7-7500U gets a score of 86.9 k points while the i7-6820HQ gets 205.9 k points.

Summarizing, the i7-6820HQ is 2.4 times faster than the i7-7500U. To get a proper comparison between both models, take a look to the data shown below.

Specs
CPUID
806e9
506e3
Core
Kaby Lake-U
Skylake-H
Architecture
Base frecuency
2.7 GHz
2.7 GHz
Boost frecuency
3.5 GHz
3.6 GHz
Socket
BGA1356
BGA1440
Cores/Threads
2/4
4/8
TDP
15 W
45 W
Cache L1 (d+i)
2x32+2x32 kB
4x32+4x32 kB
Cache L2
2x256 kB
4x256 kB
Cache L3
4096 kB
8192 kB
Date
August 2016
October 2015
Mean monothread perf.
48.67k points
50.1k points
Mean multithread perf.
86.94k points
205.89k 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
i7-7500U
i7-6820HQ
Test#1 (Integers)
3.53k
3.18k (x0.9)
Test#2 (FP)
14.67k
13.02k (x0.89)
Test#3 (Generic, ZIP)
4.84k
4.17k (x0.86)
Test#1 (Memory)
6.26k
6.93k (x1.11)
TOTAL
29.29k
27.3k (x0.93)

Multithread

i7-7500U

i7-6820HQ
Test#1 (Integers)
7.26k
13.26k (x1.83)
Test#2 (FP)
35.04k
62.23k (x1.78)
Test#3 (Generic, ZIP)
11.28k
20.34k (x1.8)
Test#1 (Memory)
5.69k
5.46k (x0.96)
TOTAL
59.27k
101.29k (x1.71)

SSE3 optimized benchmark
The benchmark in mode I (SSE) is optimized for the use of SIMD instructions with 128 bits register and the SSE set up to version 3. Nearly every modern CPU has support for this mode.
Monothread
i7-7500U
i7-6820HQ
Test#1 (Integers)
12.93k
11.54k (x0.89)
Test#2 (FP)
18.63k
16.69k (x0.9)
Test#3 (Generic, ZIP)
5.03k
4.51k (x0.9)
Test#1 (Memory)
6.16k
7.27k (x1.18)
TOTAL
42.75k
40.01k (x0.94)

Multithread

i7-7500U

i7-6820HQ
Test#1 (Integers)
27.13k
48.5k (x1.79)
Test#2 (FP)
43.19k
77.02k (x1.78)
Test#3 (Generic, ZIP)
11.7k
21.3k (x1.82)
Test#1 (Memory)
4.99k
5.24k (x1.05)
TOTAL
87.02k
152.06k (x1.75)

AVX optimized benchmark
The benchmark in mode II (AVX) is optimized to used 256 bits registers beside the first version of the Advanced Vector Extensions (AVX). The first AVX compatible CPU was released in 2011.
Monothread
i7-7500U
i7-6820HQ
Test#1 (Integers)
12.71k
11.78k (x0.93)
Test#2 (FP)
18.61k
18.06k (x0.97)
Test#3 (Generic, ZIP)
4.78k
4.48k (x0.94)
Test#1 (Memory)
6.63k
7.12k (x1.07)
TOTAL
42.72k
41.44k (x0.97)

Multithread

i7-7500U

i7-6820HQ
Test#1 (Integers)
27.27k
49.46k (x1.81)
Test#2 (FP)
44.7k
84.8k (x1.9)
Test#3 (Generic, ZIP)
11.33k
20.7k (x1.83)
Test#1 (Memory)
5.55k
4.77k (x0.86)
TOTAL
88.86k
159.73k (x1.8)

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
i7-7500U
i7-6820HQ
Test#1 (Integers)
20.74k
20.99k (x1.01)
Test#2 (FP)
18.41k
18.63k (x1.01)
Test#3 (Generic, ZIP)
3.98k
4.33k (x1.09)
Test#1 (Memory)
5.54k
6.15k (x1.11)
TOTAL
48.67k
50.1k (x1.03)

Multithread

i7-7500U

i7-6820HQ
Test#1 (Integers)
37.34k
91.8k (x2.46)
Test#2 (FP)
35.79k
87.24k (x2.44)
Test#3 (Generic, ZIP)
8.34k
20.55k (x2.47)
Test#1 (Memory)
5.48k
6.3k (x1.15)
TOTAL
86.94k
205.89k (x2.37)

Performance/W
i7-7500U
i7-6820HQ
Test#1 (Integers)
2489 points/W
2040 points/W
Test#2 (FP)
2386 points/W
1939 points/W
Test#3 (Generic, ZIP)
556 points/W
457 points/W
Test#1 (Memory)
365 points/W
140 points/W
TOTAL
5796 points/W
4575 points/W

Performance/GHz
i7-7500U
i7-6820HQ
Test#1 (Integers)
5926 points/GHz
5831 points/GHz
Test#2 (FP)
5260 points/GHz
5174 points/GHz
Test#3 (Generic, ZIP)
1137 points/GHz
1204 points/GHz
Test#1 (Memory)
1584 points/GHz
1708 points/GHz
TOTAL
13907 points/GHz
13917 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