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Core i5-8250U vs i5-2500K


Description
The i5-8250U is based on Kaby Lake architecture while the i5-2500K is based on Sandy Bridge.

Using the multithread performance as a reference, the i5-8250U gets a score of 137.1 k points while the i5-2500K gets 111.8 k points.

Summarizing, the i5-8250U is 1.2 times faster than the i5-2500K . To get a proper comparison between both models, take a look to the data shown below.

Specs
CPUID
806ea
206a7
Core
Kaby Lake-R
Sandy Bridge
Architecture
Base frecuency
1.6 GHz
3.3 GHz
Boost frecuency
3.4 GHz
3.7 GHz
Socket
BGA1356
LGA 1155
Cores/Threads
4/8
4/4
TDP
15 W
95 W
Cache L1 (d+i)
4x32+4x32 kB
4x32+x4x32 kB
Cache L2
4x256 kB
4x256 kB
Cache L3
6144 kB
6144 kB
Date
August 2017
January 2011
Mean monothread perf.
54.31k points
32.85k points
Mean multithread perf.
161.26k points
111.83k 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
i5-2500K
Test#1 (Integers)
12.59k
11.84k (x0.94)
Test#2 (FP)
18.89k
10.43k (x0.55)
Test#3 (Generic, ZIP)
4.65k
5.22k (x1.12)
Test#1 (Memory)
8.2k
5.36k (x0.65)
TOTAL
44.32k
32.85k (x0.74)

Multithread

i5-8250U

i5-2500K
Test#1 (Integers)
45.91k
45.51k (x0.99)
Test#2 (FP)
69.55k
40.83k (x0.59)
Test#3 (Generic, ZIP)
16.79k
20.7k (x1.23)
Test#1 (Memory)
4.83k
4.79k (x0.99)
TOTAL
137.09k
111.83k (x0.82)

Performance/W
i5-8250U
i5-2500K
Test#1 (Integers)
3061 points/W
479 points/W
Test#2 (FP)
4637 points/W
430 points/W
Test#3 (Generic, ZIP)
1120 points/W
218 points/W
Test#1 (Memory)
322 points/W
50 points/W
TOTAL
9139 points/W
1177 points/W

Performance/GHz
i5-8250U
i5-2500K
Test#1 (Integers)
3702 points/GHz
3200 points/GHz
Test#2 (FP)
5556 points/GHz
2818 points/GHz
Test#3 (Generic, ZIP)
1367 points/GHz
1411 points/GHz
Test#1 (Memory)
2411 points/GHz
1449 points/GHz
TOTAL
13036 points/GHz
8878 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