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Core i7-6820HQ vs i5-6500


Description
Both models i7-6820HQ and i5-6500 are based on Skylake architecture.

Sky Lake is also known as 6th generation Core. Include Thunderbolt 3.0, SATA Express and Iris Pro graphics with DirectX 12. It uses LGA 1151 socket for mainstream models and LGA 2066 for X-Series. Sky Lake comes with AVX2 support in all mainstreams CPUs and AVX-512 in some high end models.

Using the multithread performance as a reference, the i7-6820HQ gets a score of 206.3 k points while the i5-6500 gets 183.1 k points.

Summarizing, the i7-6820HQ is 1.1 times faster than the i5-6500 . To get a proper comparison between both models, take a look to the data shown below.

Specs
CPUID
506e3
506e3
Core
Skylake-H
Skylake-S
Architecture
Base frecuency
2.7 GHz
3.2 GHz
Boost frecuency
3.6 GHz
3.6 GHz
Socket
BGA1440
LGA 1151
Cores/Threads
4/8
4/4
TDP
45 W
65 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
September 2015

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
i5-6500
Test#1 (Integers)
3180
3457 (8.72%)
Test#2 (FP)
13020
14606 (12.18%)
Test#3 (Generic, ZIP)
4169
4657 (11.70%)
Test#1 (Memory)
6931
6991 (0.87%)
TOTAL
27299
29711 (8.84%)

Multithread

i7-6820HQ

i5-6500
Test#1 (Integers)
13259
12523 (-5.55%)
Test#2 (FP)
62228
51131 (-17.83%)
Test#3 (Generic, ZIP)
20342
17411 (-14.41%)
Test#1 (Memory)
5464
3896 (-28.69%)
TOTAL
101292
84961 (-16.12%)

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
i5-6500
Test#1 (Integers)
11784
13074 (10.94%)
Test#2 (FP)
18056
20232 (12.05%)
Test#3 (Generic, ZIP)
4479
4926 (9.97%)
Test#1 (Memory)
7117
9197 (29.23%)
TOTAL
41437
47429 (14.46%)

Multithread

i7-6820HQ

i5-6500
Test#1 (Integers)
49458
49623 (0.33%)
Test#2 (FP)
84798
74824 (-11.76%)
Test#3 (Generic, ZIP)
20703
18464 (-10.81%)
Test#1 (Memory)
4770
4210 (-11.74%)
TOTAL
159730
147121 (-7.89%)

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
i5-6500
Test#1 (Integers)
21147
23661 (11.89%)
Test#2 (FP)
18663
20387 (9.24%)
Test#3 (Generic, ZIP)
4359
4753 (9.02%)
Test#1 (Memory)
6240
7615 (22.04%)
TOTAL
50409
56416 (11.92%)

Multithread

i7-6820HQ

i5-6500
Test#1 (Integers)
91901
86284 (-6.11%)
Test#2 (FP)
87330
74179 (-15.06%)
Test#3 (Generic, ZIP)
20715
16917 (-18.33%)
Test#1 (Memory)
6325
5680 (-10.21%)
TOTAL
206271
183060 (-11.25%)

Performance/W
i7-6820HQ
i5-6500
Test#1 (Integers)
2042 points/W
1327 points/W
Test#2 (FP)
1941 points/W
1141 points/W
Test#3 (Generic, ZIP)
460 points/W
260 points/W
Test#1 (Memory)
141 points/W
87 points/W
TOTAL
4584 points/W
2816 points/W

Performance/GHz
i7-6820HQ
i5-6500
Test#1 (Integers)
5874 points/GHz
6572 points/GHz
Test#2 (FP)
5184 points/GHz
5663 points/GHz
Test#3 (Generic, ZIP)
1211 points/GHz
1320 points/GHz
Test#1 (Memory)
1733 points/GHz
2115 points/GHz
TOTAL
14002 points/GHz
15671 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