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Core i7-6820HQ vs i5-3570K


Description
The i7-6820HQ is based on Skylake architecture while the i5-3570K is based on Ivy Bridge.

Using the multithread performance as a reference, the i7-6820HQ gets a score of 159.7 k points while the i5-3570K gets 120.3 k points.

Summarizing, the i7-6820HQ is 1.3 times faster than the i5-3570K . To get a proper comparison between both models, take a look to the data shown below.

Specs
CPUID
506e3
306a9
Core
Skylake-H
Ivy Bridge
Architecture
Base frecuency
2.7 GHz
3.4 GHz
Boost frecuency
3.6 GHz
3.8 GHz
Socket
BGA1440
LGA 1155
Cores/Threads
4/8
4/4
TDP
45 W
77 W
Cache L1 (d+i)
4x32+4x32 kB
32+32 kB
Cache L2
4x256 kB
256 kB
Cache L3
8192 kB
6144 kB
Date
October 2015
April 2012

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
i5-3570K
Test#1 (Integers)
3180
3850 (21.08%)
Test#2 (FP)
13020
10725 (-17.62%)
Test#3 (Generic, ZIP)
4169
4856 (16.47%)
Test#1 (Memory)
6931
5118 (-26.15%)
TOTAL
27299
24550 (-10.07%)

Multithread

i7-6820HQ

i5-3570K
Test#1 (Integers)
13259
14335 (8.12%)
Test#2 (FP)
62228
40230 (-35.35%)
Test#3 (Generic, ZIP)
20342
18008 (-11.48%)
Test#1 (Memory)
5464
7152 (30.91%)
TOTAL
101292
79726 (-21.29%)

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
i5-3570K
Test#1 (Integers)
11536
12755 (10.57%)
Test#2 (FP)
16687
11728 (-29.72%)
Test#3 (Generic, ZIP)
4514
5005 (10.86%)
Test#1 (Memory)
7273
5092 (-30.00%)
TOTAL
40011
34579 (-13.58%)

Multithread

i7-6820HQ

i5-3570K
Test#1 (Integers)
48501
48067 (-0.90%)
Test#2 (FP)
77016
43088 (-44.05%)
Test#3 (Generic, ZIP)
21301
18341 (-13.89%)
Test#1 (Memory)
5242
7096 (35.36%)
TOTAL
152060
116592 (-23.33%)

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
i5-3570K
Test#1 (Integers)
11784
12522 (6.26%)
Test#2 (FP)
18056
12129 (-32.82%)
Test#3 (Generic, ZIP)
4479
4910 (9.61%)
Test#1 (Memory)
7117
5016 (-29.52%)
TOTAL
41437
34577 (-16.55%)

Multithread

i7-6820HQ

i5-3570K
Test#1 (Integers)
49458
47475 (-4.01%)
Test#2 (FP)
84798
46261 (-45.45%)
Test#3 (Generic, ZIP)
20703
18400 (-11.13%)
Test#1 (Memory)
4770
8168 (71.22%)
TOTAL
159730
120303 (-24.68%)

Performance/W
i7-6820HQ
i5-3570K
Test#1 (Integers)
1099 points/W
617 points/W
Test#2 (FP)
1884 points/W
601 points/W
Test#3 (Generic, ZIP)
460 points/W
239 points/W
Test#1 (Memory)
106 points/W
106 points/W
TOTAL
3550 points/W
1562 points/W

Performance/GHz
i7-6820HQ
i5-3570K
Test#1 (Integers)
3273 points/GHz
3295 points/GHz
Test#2 (FP)
5016 points/GHz
3192 points/GHz
Test#3 (Generic, ZIP)
1244 points/GHz
1292 points/GHz
Test#1 (Memory)
1977 points/GHz
1320 points/GHz
TOTAL
11510 points/GHz
9099 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