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Core i7-6820HQ vs i7-7500U


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

Using the multithread performance as a reference, the i7-6820HQ gets a score of 206.3 k points while the i7-7500U gets 100.6 k points.

Summarizing, the i7-6820HQ is 2.1 times faster than the i7-7500U. To get a proper comparison between both models, take a look to the data shown below.

Specs
CPUID
506e3
806e9
Core
Skylake-H
Kaby Lake-U
Architecture
Base frecuency
2.7 GHz
2.7 GHz
Boost frecuency
3.6 GHz
3.5 GHz
Socket
BGA1440
BGA1356
Cores/Threads
4/8
2/4
TDP
45 W
15 W
Cache L1 (d+i)
4x32+4x32 kB
2x32+2x32 kB
Cache L2
4x256 kB
2x256 kB
Cache L3
8192 kB
4096 kB
Date
October 2015
August 2016

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
i7-6820HQ
i7-7500U
Test#1 (Integers)
3180
3525 (10.87%)
Test#2 (FP)
13020
14669 (12.67%)
Test#3 (Generic, ZIP)
4169
4837 (16.02%)
Test#1 (Memory)
6931
6256 (-9.73%)
TOTAL
27299
29287 (7.28%)

Multithread

i7-6820HQ

i7-7500U
Test#1 (Integers)
13259
7263 (-45.22%)
Test#2 (FP)
62228
35040 (-43.69%)
Test#3 (Generic, ZIP)
20342
11276 (-44.57%)
Test#1 (Memory)
5464
5695 (4.23%)
TOTAL
101292
59273 (-41.48%)

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
i7-6820HQ
i7-7500U
Test#1 (Integers)
11536
12932 (12.09%)
Test#2 (FP)
16687
18628 (11.63%)
Test#3 (Generic, ZIP)
4514
5031 (11.44%)
Test#1 (Memory)
7273
6163 (-15.26%)
TOTAL
40011
42753 (6.85%)

Multithread

i7-6820HQ

i7-7500U
Test#1 (Integers)
48501
27132 (-44.06%)
Test#2 (FP)
77016
43194 (-43.92%)
Test#3 (Generic, ZIP)
21301
11703 (-45.06%)
Test#1 (Memory)
5242
4990 (-4.81%)
TOTAL
152060
87018 (-42.77%)

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
i7-6820HQ
i7-7500U
Test#1 (Integers)
11784
12707 (7.83%)
Test#2 (FP)
18056
18607 (3.05%)
Test#3 (Generic, ZIP)
4479
4777 (6.64%)
Test#1 (Memory)
7117
6633 (-6.80%)
TOTAL
41437
42724 (3.11%)

Multithread

i7-6820HQ

i7-7500U
Test#1 (Integers)
49458
27271 (-44.86%)
Test#2 (FP)
84798
44704 (-47.28%)
Test#3 (Generic, ZIP)
20703
11329 (-45.28%)
Test#1 (Memory)
4770
5555 (16.44%)
TOTAL
159730
88858 (-44.37%)

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
i7-6820HQ
i7-7500U
Test#1 (Integers)
21147
19893 (-5.93%)
Test#2 (FP)
18663
18106 (-2.98%)
Test#3 (Generic, ZIP)
4359
4168 (-4.39%)
Test#1 (Memory)
6240
5404 (-13.39%)
TOTAL
50409
47572 (-5.63%)

Multithread

i7-6820HQ

i7-7500U
Test#1 (Integers)
91901
43630 (-52.53%)
Test#2 (FP)
87330
42764 (-51.03%)
Test#3 (Generic, ZIP)
20715
9415 (-54.55%)
Test#1 (Memory)
6325
4745 (-24.98%)
TOTAL
206271
100554 (-51.25%)

Performance/W
i7-6820HQ
i7-7500U
Test#1 (Integers)
2042 points/W
2909 points/W
Test#2 (FP)
1941 points/W
2851 points/W
Test#3 (Generic, ZIP)
460 points/W
628 points/W
Test#1 (Memory)
141 points/W
316 points/W
TOTAL
4584 points/W
6704 points/W

Performance/GHz
i7-6820HQ
i7-7500U
Test#1 (Integers)
5874 points/GHz
5684 points/GHz
Test#2 (FP)
5184 points/GHz
5173 points/GHz
Test#3 (Generic, ZIP)
1211 points/GHz
1191 points/GHz
Test#1 (Memory)
1733 points/GHz
1544 points/GHz
TOTAL
14002 points/GHz
13592 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. 3.7.8