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Core i7-6820HQ vs i7-4500U


Description
The i7-6820HQ is based on Skylake architecture while the i7-4500U is based on Haswell.

Using the multithread performance as a reference, the i7-6820HQ gets a score of 206.3 k points while the i7-4500U gets 68.3 k points.

Summarizing, the i7-6820HQ is 3 times faster than the i7-4500U . To get a proper comparison between both models, take a look to the data shown below.

Specs
CPUID
506e3
40651
Core
Skylake-H
Haswell
Architecture
Base frecuency
2.7 GHz
1.8 GHz
Boost frecuency
3.6 GHz
3 GHz
Socket
BGA1440
BGA1168
Cores/Threads
4/8
2 /2
TDP
45 W
15 W
Cache L1 (d+i)
4x32+4x32 kB
32+32 kB
Cache L2
4x256 kB
256 kB
Cache L3
8192 kB
4096 kB
Date
October 2015
Jun 2013

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
i7-4500U
Test#1 (Integers)
3180
3313 (4.20%)
Test#2 (FP)
13020
8374 (-35.68%)
Test#3 (Generic, ZIP)
4169
3680 (-11.73%)
Test#1 (Memory)
6931
3343 (-51.76%)
TOTAL
27299
18711 (-31.46%)

Multithread

i7-6820HQ

i7-4500U
Test#1 (Integers)
13259
5207 (-60.73%)
Test#2 (FP)
62228
18544 (-70.20%)
Test#3 (Generic, ZIP)
20342
7797 (-61.67%)
Test#1 (Memory)
5464
3545 (-35.12%)
TOTAL
101292
35092 (-65.36%)

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
i7-4500U
Test#1 (Integers)
11536
10196 (-11.62%)
Test#2 (FP)
16687
9233 (-44.67%)
Test#3 (Generic, ZIP)
4514
3894 (-13.74%)
Test#1 (Memory)
7273
3291 (-54.75%)
TOTAL
40011
26614 (-33.48%)

Multithread

i7-6820HQ

i7-4500U
Test#1 (Integers)
48501
19204 (-60.41%)
Test#2 (FP)
77016
19017 (-75.31%)
Test#3 (Generic, ZIP)
21301
8308 (-61.00%)
Test#1 (Memory)
5242
3222 (-38.53%)
TOTAL
152060
49751 (-67.28%)

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
i7-4500U
Test#1 (Integers)
11784
10412 (-11.65%)
Test#2 (FP)
18056
8970 (-50.32%)
Test#3 (Generic, ZIP)
4479
3821 (-14.70%)
Test#1 (Memory)
7117
3385 (-52.44%)
TOTAL
41437
26588 (-35.83%)

Multithread

i7-6820HQ

i7-4500U
Test#1 (Integers)
49458
19907 (-59.75%)
Test#2 (FP)
84798
21470 (-74.68%)
Test#3 (Generic, ZIP)
20703
8534 (-58.78%)
Test#1 (Memory)
4770
3531 (-25.99%)
TOTAL
159730
53442 (-66.54%)

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
i7-4500U
Test#1 (Integers)
21147
17226 (-18.54%)
Test#2 (FP)
18663
9053 (-51.49%)
Test#3 (Generic, ZIP)
4359
4032 (-7.51%)
Test#1 (Memory)
6240
3623 (-41.94%)
TOTAL
50409
33933 (-32.68%)

Multithread

i7-6820HQ

i7-4500U
Test#1 (Integers)
91901
33150 (-63.93%)
Test#2 (FP)
87330
22687 (-74.02%)
Test#3 (Generic, ZIP)
20715
8735 (-57.83%)
Test#1 (Memory)
6325
3696 (-41.57%)
TOTAL
206271
68268 (-66.90%)

Performance/W
i7-6820HQ
i7-4500U
Test#1 (Integers)
2042 points/W
2210 points/W
Test#2 (FP)
1941 points/W
1512 points/W
Test#3 (Generic, ZIP)
460 points/W
582 points/W
Test#1 (Memory)
141 points/W
246 points/W
TOTAL
4584 points/W
4551 points/W

Performance/GHz
i7-6820HQ
i7-4500U
Test#1 (Integers)
5874 points/GHz
5742 points/GHz
Test#2 (FP)
5184 points/GHz
3018 points/GHz
Test#3 (Generic, ZIP)
1211 points/GHz
1344 points/GHz
Test#1 (Memory)
1733 points/GHz
1208 points/GHz
TOTAL
14002 points/GHz
11311 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