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Core i7-6600U vs i7-8750H


Description
The i7-6600U is based on Skylake architecture while the i7-8750H is based on Coffee Lake.

Using the multithread performance as a reference, the i7-6600U gets a score of 79.2 k points while the i7-8750H gets 231.9 k points.

Summarizing, the i7-8750H is 2.9 times faster than the i7-6600U. To get a proper comparison between both models, take a look to the data shown below.

Specs
CPUID
406e3
906ea
Core
Skylake-U
Coffee Lake-H
Architecture
Base frecuency
2.6 GHz
2.2 GHz
Boost frecuency
3.4 GHz
4.1 GHz
Socket
BGA1356
BGA1440
Cores/Threads
2/4
6/12
TDP
15 W
45 W
Cache L1 (d+i)
2x32+2x32 kB
6x32+6x32 kB
Cache L2
2x256 kB
6x256 kB
Cache L3
4096 kB
9216 kB
Date
September 2015
April 2018
Mean monothread perf.
39.73k points
53.41k points
Mean multithread perf.
79.22k points
231.9k 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
i7-6600U
i7-8750H
Test#1 (Integers)
2.75k
3.01k (x1.1)
Test#2 (FP)
12.23k
11.68k (x0.96)
Test#3 (Generic, ZIP)
3.9k
3.78k (x0.97)
Test#1 (Memory)
5.61k
5.64k (x1.01)
TOTAL
24.48k
24.12k (x0.99)

Multithread

i7-6600U

i7-8750H
Test#1 (Integers)
5.23k
7.4k (x1.42)
Test#2 (FP)
25k
29.99k (x1.2)
Test#3 (Generic, ZIP)
8.98k
9.66k (x1.08)
Test#1 (Memory)
4.73k
5.12k (x1.08)
TOTAL
43.95k
52.18k (x1.19)

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
i7-6600U
i7-8750H
Test#1 (Integers)
8.49k
15.14k (x1.78)
Test#2 (FP)
10.92k
22.8k (x2.09)
Test#3 (Generic, ZIP)
2.76k
5.5k (x1.99)
Test#1 (Memory)
4.93k
10.97k (x2.23)
TOTAL
27.1k
54.41k (x2.01)

Multithread

i7-6600U

i7-8750H
Test#1 (Integers)
14.11k
82.81k (x5.87)
Test#2 (FP)
20.05k
118.58k (x5.91)
Test#3 (Generic, ZIP)
6.17k
25.08k (x4.07)
Test#1 (Memory)
4.73k
4.86k (x1.03)
TOTAL
45.05k
231.34k (x5.13)

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
i7-6600U
i7-8750H
Test#1 (Integers)
16.72k
22.36k (x1.34)
Test#2 (FP)
14.7k
19.33k (x1.31)
Test#3 (Generic, ZIP)
3.4k
4.4k (x1.3)
Test#1 (Memory)
4.9k
7.32k (x1.49)
TOTAL
39.73k
53.41k (x1.34)

Multithread

i7-6600U

i7-8750H
Test#1 (Integers)
33.41k
103.82k (x3.11)
Test#2 (FP)
31.66k
100.47k (x3.17)
Test#3 (Generic, ZIP)
8.18k
23.81k (x2.91)
Test#1 (Memory)
5.97k
3.8k (x0.64)
TOTAL
79.22k
231.9k (x2.93)

Performance/W
i7-6600U
i7-8750H
Test#1 (Integers)
2227 points/W
2307 points/W
Test#2 (FP)
2111 points/W
2233 points/W
Test#3 (Generic, ZIP)
546 points/W
529 points/W
Test#1 (Memory)
398 points/W
84 points/W
TOTAL
5282 points/W
5153 points/W

Performance/GHz
i7-6600U
i7-8750H
Test#1 (Integers)
4919 points/GHz
5454 points/GHz
Test#2 (FP)
4325 points/GHz
4714 points/GHz
Test#3 (Generic, ZIP)
999 points/GHz
1073 points/GHz
Test#1 (Memory)
1441 points/GHz
1786 points/GHz
TOTAL
11684 points/GHz
13027 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