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Core i5-8250U vs i5-6600K


Description
The i5-8250U is based on Kaby Lake architecture while the i5-6600K is based on Skylake.

Using the multithread performance as a reference, the i5-8250U gets a score of 137.1 k points while the i5-6600K gets 209.3 k points.

Summarizing, the i5-6600K is 1.5 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
3.5 GHz
Boost frecuency
3.4 GHz
3.9 GHz
Socket
BGA1356
LGA 1151
Cores/Threads
4/8
4/4
TDP
15 W
95 W
Cache L1 (d+i)
4x32+4x32 kB
4x32+4x32 kB
Cache L2
4x256 kB
256 kB
Cache L3
6144 kB
6144 kB
Date
August 2017
May 2015
Mean monothread perf.
54.31k points
59.28k points
Mean multithread perf.
161.26k points
209.28k points

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
i5-6600K
Test#1 (Integers)
12.59k
17.24k (x1.37)
Test#2 (FP)
18.89k
26.5k (x1.4)
Test#3 (Generic, ZIP)
4.65k
6.45k (x1.39)
Test#1 (Memory)
8.2k
9.09k (x1.11)
TOTAL
44.32k
59.28k (x1.34)

Multithread

i5-8250U

i5-6600K
Test#1 (Integers)
45.91k
68.47k (x1.49)
Test#2 (FP)
69.55k
105.05k (x1.51)
Test#3 (Generic, ZIP)
16.79k
25.24k (x1.5)
Test#1 (Memory)
4.83k
10.5k (x2.17)
TOTAL
137.09k
209.28k (x1.53)

Performance/W
i5-8250U
i5-6600K
Test#1 (Integers)
3061 points/W
721 points/W
Test#2 (FP)
4637 points/W
1106 points/W
Test#3 (Generic, ZIP)
1120 points/W
266 points/W
Test#1 (Memory)
322 points/W
111 points/W
TOTAL
9139 points/W
2203 points/W

Performance/GHz
i5-8250U
i5-6600K
Test#1 (Integers)
3702 points/GHz
4420 points/GHz
Test#2 (FP)
5556 points/GHz
6795 points/GHz
Test#3 (Generic, ZIP)
1367 points/GHz
1653 points/GHz
Test#1 (Memory)
2411 points/GHz
2331 points/GHz
TOTAL
13036 points/GHz
15199 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