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Core i7-6820HQ vs i5-5675R


Description
The i7-6820HQ is based on Skylake architecture while the i5-5675R is based on Broadwell.

Using the multithread performance as a reference, the i7-6820HQ gets a score of 205.9 k points while the i5-5675R gets 194.2 k points.

Summarizing, the i7-6820HQ is 1.1 times faster than the i5-5675R. To get a proper comparison between both models, take a look to the data shown below.

Specs
CPUID
506e3
40671
Core
Skylake-H
Bradwell-H
Architecture
Base frecuency
2.7 GHz
3.1 GHz
Boost frecuency
3.6 GHz
3.6 GHz
Socket
BGA1440
BGA1364
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
4096 kB
Date
October 2015
June 2015
Mean monothread perf.
50.1k points
51.43k points
Mean multithread perf.
205.89k points
194.2k 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
i7-6820HQ
i5-5675R
Test#1 (Integers)
3.18k
4.14k (x1.3)
Test#2 (FP)
13.02k
14.35k (x1.1)
Test#3 (Generic, ZIP)
4.17k
4.94k (x1.18)
Test#1 (Memory)
6.93k
5.47k (x0.79)
TOTAL
27.3k
28.91k (x1.06)

Multithread

i7-6820HQ

i5-5675R
Test#1 (Integers)
13.26k
16.02k (x1.21)
Test#2 (FP)
62.23k
54.6k (x0.88)
Test#3 (Generic, ZIP)
20.34k
18.69k (x0.92)
Test#1 (Memory)
5.46k
16.87k (x3.09)
TOTAL
101.29k
106.18k (x1.05)

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
i5-5675R
Test#1 (Integers)
11.54k
12.86k (x1.11)
Test#2 (FP)
16.69k
16.85k (x1.01)
Test#3 (Generic, ZIP)
4.51k
5.19k (x1.15)
Test#1 (Memory)
7.27k
5.49k (x0.76)
TOTAL
40.01k
40.39k (x1.01)

Multithread

i7-6820HQ

i5-5675R
Test#1 (Integers)
48.5k
50.07k (x1.03)
Test#2 (FP)
77.02k
64.61k (x0.84)
Test#3 (Generic, ZIP)
21.3k
19.84k (x0.93)
Test#1 (Memory)
5.24k
17.09k (x3.26)
TOTAL
152.06k
151.6k (x1)

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
i5-5675R
Test#1 (Integers)
11.78k
12.88k (x1.09)
Test#2 (FP)
18.06k
18.27k (x1.01)
Test#3 (Generic, ZIP)
4.48k
5.12k (x1.14)
Test#1 (Memory)
7.12k
5.45k (x0.77)
TOTAL
41.44k
41.72k (x1.01)

Multithread

i7-6820HQ

i5-5675R
Test#1 (Integers)
49.46k
49.91k (x1.01)
Test#2 (FP)
84.8k
70.3k (x0.83)
Test#3 (Generic, ZIP)
20.7k
19.69k (x0.95)
Test#1 (Memory)
4.77k
16.92k (x3.55)
TOTAL
159.73k
156.83k (x0.98)

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
i5-5675R
Test#1 (Integers)
20.99k
21.91k (x1.04)
Test#2 (FP)
18.63k
18.59k (x1)
Test#3 (Generic, ZIP)
4.33k
5.2k (x1.2)
Test#1 (Memory)
6.15k
5.72k (x0.93)
TOTAL
50.1k
51.43k (x1.03)

Multithread

i7-6820HQ

i5-5675R
Test#1 (Integers)
91.8k
84.92k (x0.93)
Test#2 (FP)
87.24k
72.09k (x0.83)
Test#3 (Generic, ZIP)
20.55k
20.13k (x0.98)
Test#1 (Memory)
6.3k
17.07k (x2.71)
TOTAL
205.89k
194.2k (x0.94)

Performance/W
i7-6820HQ
i5-5675R
Test#1 (Integers)
2040 points/W
1306 points/W
Test#2 (FP)
1939 points/W
1109 points/W
Test#3 (Generic, ZIP)
457 points/W
310 points/W
Test#1 (Memory)
140 points/W
263 points/W
TOTAL
4575 points/W
2988 points/W

Performance/GHz
i7-6820HQ
i5-5675R
Test#1 (Integers)
5831 points/GHz
6087 points/GHz
Test#2 (FP)
5174 points/GHz
5164 points/GHz
Test#3 (Generic, ZIP)
1204 points/GHz
1445 points/GHz
Test#1 (Memory)
1708 points/GHz
1590 points/GHz
TOTAL
13917 points/GHz
14286 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