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Core i5-8250U vs i5-6500


Description
The i5-8250U is based on Kaby Lake architecture while the i5-6500 is based on Skylake.

Using the multithread performance as a reference, the i5-8250U gets a score of 161.3 k points while the i5-6500 gets 179.4 k points.

Summarizing, the i5-6500 is 1.1 times faster than the i5-8250U. To get a proper comparison between both models, take a look to the data shown below.

Specs
CPUID
806ea
506e3
Core
Kaby Lake-R
Skylake-S
Architecture
Base frecuency
1.6 GHz
3.2 GHz
Boost frecuency
3.4 GHz
3.6 GHz
Socket
BGA1356
LGA 1151
Cores/Threads
4/8
4/4
TDP
15 W
65 W
Cache L1 (d+i)
4x32+4x32 kB
4x32+4x32 kB
Cache L2
4x256 kB
4x256 kB
Cache L3
6144 kB
6144 kB
Date
August 2017
September 2015
Mean monothread perf.
54.31k points
53.7k points
Mean multithread perf.
161.26k points
179.44k 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
i5-8250U
i5-6500
Test#1 (Integers)
3.32k
3.46k (x1.04)
Test#2 (FP)
13.5k
14.61k (x1.08)
Test#3 (Generic, ZIP)
4.11k
4.66k (x1.13)
Test#1 (Memory)
7.42k
6.99k (x0.94)
TOTAL
28.34k
29.71k (x1.05)

Multithread

i5-8250U

i5-6500
Test#1 (Integers)
13.97k
12.52k (x0.9)
Test#2 (FP)
50.8k
51.13k (x1.01)
Test#3 (Generic, ZIP)
14.71k
17.41k (x1.18)
Test#1 (Memory)
4.76k
3.9k (x0.82)
TOTAL
84.24k
84.96k (x1.01)

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
i5-8250U
i5-6500
Test#1 (Integers)
12.59k
13.07k (x1.04)
Test#2 (FP)
18.89k
20.23k (x1.07)
Test#3 (Generic, ZIP)
4.65k
4.93k (x1.06)
Test#1 (Memory)
8.2k
9.2k (x1.12)
TOTAL
44.32k
47.43k (x1.07)

Multithread

i5-8250U

i5-6500
Test#1 (Integers)
45.91k
49.62k (x1.08)
Test#2 (FP)
69.55k
74.82k (x1.08)
Test#3 (Generic, ZIP)
16.79k
18.46k (x1.1)
Test#1 (Memory)
4.83k
4.21k (x0.87)
TOTAL
137.09k
147.12k (x1.07)

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
i5-8250U
i5-6500
Test#1 (Integers)
22.11k
22.89k (x1.04)
Test#2 (FP)
19.64k
19.87k (x1.01)
Test#3 (Generic, ZIP)
4.54k
4.58k (x1.01)
Test#1 (Memory)
8.03k
6.36k (x0.79)
TOTAL
54.31k
53.7k (x0.99)

Multithread

i5-8250U

i5-6500
Test#1 (Integers)
74.19k
84.36k (x1.14)
Test#2 (FP)
66.27k
72.91k (x1.1)
Test#3 (Generic, ZIP)
15.97k
16.08k (x1.01)
Test#1 (Memory)
4.83k
6.1k (x1.26)
TOTAL
161.26k
179.44k (x1.11)

Performance/W
i5-8250U
i5-6500
Test#1 (Integers)
4946 points/W
1298 points/W
Test#2 (FP)
4418 points/W
1122 points/W
Test#3 (Generic, ZIP)
1065 points/W
247 points/W
Test#1 (Memory)
322 points/W
94 points/W
TOTAL
10751 points/W
2761 points/W

Performance/GHz
i5-8250U
i5-6500
Test#1 (Integers)
6503 points/GHz
6359 points/GHz
Test#2 (FP)
5777 points/GHz
5521 points/GHz
Test#3 (Generic, ZIP)
1334 points/GHz
1271 points/GHz
Test#1 (Memory)
2361 points/GHz
1766 points/GHz
TOTAL
15975 points/GHz
14917 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