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Core i7-6820HQ vs i7-4720HQ


Description
The i7-6820HQ is based on Skylake architecture while the i7-4720HQ is based on Haswell.

Using the multithread performance as a reference, the i7-6820HQ gets a score of 206.3 k points while the i7-4720HQ gets 132.3 k points.

Summarizing, the i7-6820HQ is 1.6 times faster than the i7-4720HQ. To get a proper comparison between both models, take a look to the data shown below.

Specs
CPUID
506e3
306c3
Core
Skylake-H
Haswell
Architecture
Base frecuency
2.7 GHz
2.6 GHz
Boost frecuency
3.6 GHz
3.6 GHz
Socket
BGA1440
BGA1364
Cores/Threads
4/8
4/8
TDP
45 W
47 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
January 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
i7-4720HQ
Test#1 (Integers)
3180
3789 (19.17%)
Test#2 (FP)
13020
9638 (-25.98%)
Test#3 (Generic, ZIP)
4169
4341 (4.13%)
Test#1 (Memory)
6931
3760 (-45.75%)
TOTAL
27299
21528 (-21.14%)

Multithread

i7-6820HQ

i7-4720HQ
Test#1 (Integers)
13259
11658 (-12.07%)
Test#2 (FP)
62228
37710 (-39.40%)
Test#3 (Generic, ZIP)
20342
16376 (-19.50%)
Test#1 (Memory)
5464
5944 (8.79%)
TOTAL
101292
71688 (-29.23%)

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
i7-4720HQ
Test#1 (Integers)
21147
20683 (-2.20%)
Test#2 (FP)
18663
10280 (-44.92%)
Test#3 (Generic, ZIP)
4359
4866 (11.61%)
Test#1 (Memory)
6240
4288 (-31.29%)
TOTAL
50409
40116 (-20.42%)

Multithread

i7-6820HQ

i7-4720HQ
Test#1 (Integers)
91901
66843 (-27.27%)
Test#2 (FP)
87330
42848 (-50.94%)
Test#3 (Generic, ZIP)
20715
16772 (-19.03%)
Test#1 (Memory)
6325
5883 (-6.99%)
TOTAL
206271
132346 (-35.84%)

Performance/W
i7-6820HQ
i7-4720HQ
Test#1 (Integers)
2042 points/W
1422 points/W
Test#2 (FP)
1941 points/W
912 points/W
Test#3 (Generic, ZIP)
460 points/W
357 points/W
Test#1 (Memory)
141 points/W
125 points/W
TOTAL
4584 points/W
2816 points/W

Performance/GHz
i7-6820HQ
i7-4720HQ
Test#1 (Integers)
5874 points/GHz
5745 points/GHz
Test#2 (FP)
5184 points/GHz
2856 points/GHz
Test#3 (Generic, ZIP)
1211 points/GHz
1352 points/GHz
Test#1 (Memory)
1733 points/GHz
1191 points/GHz
TOTAL
14002 points/GHz
11143 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