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Core i7-6820HQ vs i7-8550U


Description
The i7-6820HQ is based on Skylake architecture while the i7-8550U 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 i7-8550U gets 169.9 k points.

Summarizing, the i7-6820HQ is 1.2 times faster than the i7-8550U. To get a proper comparison between both models, take a look to the data shown below.

Specs
CPUID
506e3
806ea
Core
Skylake-H
Kaby Lake-R
Architecture
Base frecuency
2.7 GHz
1.8 GHz
Boost frecuency
3.6 GHz
4 GHz
Socket
BGA1440
BGA1356
Cores/Threads
4/8
4/8
TDP
45 W
15 W
Cache L1 (d+i)
4x32+4x32 kB
4x32+4x32 kB
Cache L2
4x256 kB
4x256 kB
Cache L3
8192 kB
8192 kB
Date
October 2015
August 2017

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
i7-8550U
Test#1 (Integers)
3180
3911 (23.01%)
Test#2 (FP)
13020
15977 (22.71%)
Test#3 (Generic, ZIP)
4169
5112 (22.63%)
Test#1 (Memory)
6931
11046 (59.37%)
TOTAL
27299
36047 (32.04%)

Multithread

i7-6820HQ

i7-8550U
Test#1 (Integers)
13259
11761 (-11.30%)
Test#2 (FP)
62228
50154 (-19.40%)
Test#3 (Generic, ZIP)
20342
16756 (-17.63%)
Test#1 (Memory)
5464
4166 (-23.74%)
TOTAL
101292
82837 (-18.22%)

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
i7-8550U
Test#1 (Integers)
11536
12928 (12.06%)
Test#2 (FP)
16687
20589 (23.38%)
Test#3 (Generic, ZIP)
4514
5410 (19.85%)
Test#1 (Memory)
7273
10479 (44.07%)
TOTAL
40011
49406 (23.48%)

Multithread

i7-6820HQ

i7-8550U
Test#1 (Integers)
48501
41109 (-15.24%)
Test#2 (FP)
77016
65038 (-15.55%)
Test#3 (Generic, ZIP)
21301
17532 (-17.69%)
Test#1 (Memory)
5242
4222 (-19.46%)
TOTAL
152060
127900 (-15.89%)

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
i7-8550U
Test#1 (Integers)
11784
13153 (11.61%)
Test#2 (FP)
18056
19696 (9.08%)
Test#3 (Generic, ZIP)
4479
5101 (13.89%)
Test#1 (Memory)
7117
9213 (29.44%)
TOTAL
41437
47162 (13.82%)

Multithread

i7-6820HQ

i7-8550U
Test#1 (Integers)
49458
34130 (-30.99%)
Test#2 (FP)
84798
53788 (-36.57%)
Test#3 (Generic, ZIP)
20703
13906 (-32.83%)
Test#1 (Memory)
4770
4125 (-13.54%)
TOTAL
159730
105948 (-33.67%)

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
i7-8550U
Test#1 (Integers)
21147
25859 (22.28%)
Test#2 (FP)
18663
23009 (23.29%)
Test#3 (Generic, ZIP)
4359
5225 (19.84%)
Test#1 (Memory)
6240
11503 (84.34%)
TOTAL
50409
65595 (30.13%)

Multithread

i7-6820HQ

i7-8550U
Test#1 (Integers)
91901
74572 (-18.86%)
Test#2 (FP)
87330
73316 (-16.05%)
Test#3 (Generic, ZIP)
20715
17857 (-13.80%)
Test#1 (Memory)
6325
4203 (-33.55%)
TOTAL
206271
169947 (-17.61%)

Performance/W
i7-6820HQ
i7-8550U
Test#1 (Integers)
2042 points/W
4971 points/W
Test#2 (FP)
1941 points/W
4888 points/W
Test#3 (Generic, ZIP)
460 points/W
1190 points/W
Test#1 (Memory)
141 points/W
280 points/W
TOTAL
4584 points/W
11330 points/W

Performance/GHz
i7-6820HQ
i7-8550U
Test#1 (Integers)
5874 points/GHz
6465 points/GHz
Test#2 (FP)
5184 points/GHz
5752 points/GHz
Test#3 (Generic, ZIP)
1211 points/GHz
1306 points/GHz
Test#1 (Memory)
1733 points/GHz
2876 points/GHz
TOTAL
14002 points/GHz
16399 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