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Core i7-6820HQ vs i7-5820K


Description
The i7-6820HQ is based on Skylake architecture while the i7-5820K is based on Haswell.

Using the multithread performance as a reference, the i7-6820HQ gets a score of 159.7 k points while the i7-5820K gets 129.1 k points.

Summarizing, the i7-6820HQ is 1.2 times faster than the i7-5820K . To get a proper comparison between both models, take a look to the data shown below.

Specs
CPUID
506e3
306f2
Core
Skylake-H
Haswell-E
Architecture
Base frecuency
2.7 GHz
3.3 GHz
Boost frecuency
3.6 GHz
3.6 GHz
Socket
BGA1440
LGA 1150
Cores/Threads
4/8
6/12
TDP
45 W
140 W
Cache L1 (d+i)
4x32+4x32 kB
32+32 kB
Cache L2
4x256 kB
256 kB
Cache L3
8192 kB
15360 kB
Date
October 2015
September 2014

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
i7-5820K
Test#1 (Integers)
3180
3822 (20.18%)
Test#2 (FP)
13020
9641 (-25.95%)
Test#3 (Generic, ZIP)
4169
4286 (2.82%)
Test#1 (Memory)
6931
3781 (-45.45%)
TOTAL
27299
21530 (-21.13%)

Multithread

i7-6820HQ

i7-5820K
Test#1 (Integers)
13259
18067 (36.26%)
Test#2 (FP)
62228
64252 (3.25%)
Test#3 (Generic, ZIP)
20342
27029 (32.87%)
Test#1 (Memory)
5464
8034 (47.05%)
TOTAL
101292
117381 (15.88%)

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
i7-5820K
Test#1 (Integers)
11784
12034 (2.12%)
Test#2 (FP)
18056
11229 (-37.81%)
Test#3 (Generic, ZIP)
4479
4549 (1.56%)
Test#1 (Memory)
7117
3720 (-47.74%)
TOTAL
41437
31532 (-23.90%)

Multithread

i7-6820HQ

i7-5820K
Test#1 (Integers)
49458
49480 (0.04%)
Test#2 (FP)
84798
52213 (-38.43%)
Test#3 (Generic, ZIP)
20703
19703 (-4.83%)
Test#1 (Memory)
4770
7666 (60.70%)
TOTAL
159730
129061 (-19.20%)

Performance/W
i7-6820HQ
i7-5820K
Test#1 (Integers)
1099 points/W
353 points/W
Test#2 (FP)
1884 points/W
373 points/W
Test#3 (Generic, ZIP)
460 points/W
141 points/W
Test#1 (Memory)
106 points/W
55 points/W
TOTAL
3550 points/W
922 points/W

Performance/GHz
i7-6820HQ
i7-5820K
Test#1 (Integers)
3273 points/GHz
3343 points/GHz
Test#2 (FP)
5016 points/GHz
3119 points/GHz
Test#3 (Generic, ZIP)
1244 points/GHz
1264 points/GHz
Test#1 (Memory)
1977 points/GHz
1033 points/GHz
TOTAL
11510 points/GHz
8759 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