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Core i7-6820HQ vs i5-8265U


Description
The i7-6820HQ is based on Skylake architecture while the i5-8265U is based on Whiskey Lake.

Using the multithread performance as a reference, the i7-6820HQ gets a score of 206.3 k points while the i5-8265U gets 190 k points.

Summarizing, the i7-6820HQ is 1.1 times faster than the i5-8265U. To get a proper comparison between both models, take a look to the data shown below.

Specs
CPUID
506e3
806ec
Core
Skylake-H
Whiskey Lake-U
Architecture
Base frecuency
2.7 GHz
1.6 GHz
Boost frecuency
3.6 GHz
3.9 GHz
Socket
BGA1440
BGA1528
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
6144 kB
Date
October 2015
August 2018

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
i5-8265U
Test#1 (Integers)
3180
3676 (15.60%)
Test#2 (FP)
13020
16084 (23.53%)
Test#3 (Generic, ZIP)
4169
4985 (19.58%)
Test#1 (Memory)
6931
7948 (14.67%)
TOTAL
27299
32693 (19.76%)

Multithread

i7-6820HQ

i5-8265U
Test#1 (Integers)
13259
14285 (7.74%)
Test#2 (FP)
62228
61154 (-1.73%)
Test#3 (Generic, ZIP)
20342
16527 (-18.75%)
Test#1 (Memory)
5464
3721 (-31.90%)
TOTAL
101292
95687 (-5.53%)

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
i5-8265U
Test#1 (Integers)
11536
13599 (17.88%)
Test#2 (FP)
16687
20026 (20.01%)
Test#3 (Generic, ZIP)
4514
5195 (15.07%)
Test#1 (Memory)
7273
7052 (-3.05%)
TOTAL
40011
45871 (14.65%)

Multithread

i7-6820HQ

i5-8265U
Test#1 (Integers)
48501
51420 (6.02%)
Test#2 (FP)
77016
77478 (0.60%)
Test#3 (Generic, ZIP)
21301
16653 (-21.82%)
Test#1 (Memory)
5242
3687 (-29.66%)
TOTAL
152060
149239 (-1.86%)

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
i5-8265U
Test#1 (Integers)
11784
13657 (15.89%)
Test#2 (FP)
18056
21172 (17.26%)
Test#3 (Generic, ZIP)
4479
5001 (11.65%)
Test#1 (Memory)
7117
8115 (14.01%)
TOTAL
41437
47944 (15.71%)

Multithread

i7-6820HQ

i5-8265U
Test#1 (Integers)
49458
51363 (3.85%)
Test#2 (FP)
84798
79717 (-5.99%)
Test#3 (Generic, ZIP)
20703
16613 (-19.76%)
Test#1 (Memory)
4770
3748 (-21.44%)
TOTAL
159730
151440 (-5.19%)

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
i5-8265U
Test#1 (Integers)
21147
24140 (14.15%)
Test#2 (FP)
18663
21605 (15.76%)
Test#3 (Generic, ZIP)
4359
5147 (18.05%)
Test#1 (Memory)
6240
7580 (21.47%)
TOTAL
50409
58470 (15.99%)

Multithread

i7-6820HQ

i5-8265U
Test#1 (Integers)
91901
87571 (-4.71%)
Test#2 (FP)
87330
81347 (-6.85%)
Test#3 (Generic, ZIP)
20715
17275 (-16.60%)
Test#1 (Memory)
6325
3776 (-40.30%)
TOTAL
206271
189969 (-7.90%)

Performance/W
i7-6820HQ
i5-8265U
Test#1 (Integers)
2042 points/W
5838 points/W
Test#2 (FP)
1941 points/W
5423 points/W
Test#3 (Generic, ZIP)
460 points/W
1152 points/W
Test#1 (Memory)
141 points/W
252 points/W
TOTAL
4584 points/W
12665 points/W

Performance/GHz
i7-6820HQ
i5-8265U
Test#1 (Integers)
5874 points/GHz
6190 points/GHz
Test#2 (FP)
5184 points/GHz
5540 points/GHz
Test#3 (Generic, ZIP)
1211 points/GHz
1320 points/GHz
Test#1 (Memory)
1733 points/GHz
1943 points/GHz
TOTAL
14002 points/GHz
14992 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