Core i5-8250U vs i7-7660U
Description
Both models i5-8250U and i7-7660U are based on Kaby Lake architecture.
The first Kaby Lake CPU was released in August 2016. It uses a 14 nm process and was the first architecture in breaking the previous tick-tock model. Actually, it is not that different from the preceding Skylake: it has 64kB of L1 cache and 256kB L2 cache per core.
Using the multithread performance as a reference, the i5-8250U gets a score of 161.3 k points while the i7-7660U gets 132.8 k points.
Summarizing, the i5-8250U is 1.2 times faster than the i7-7660U. To get a proper comparison between both models, take a look to the data shown below.
The first Kaby Lake CPU was released in August 2016. It uses a 14 nm process and was the first architecture in breaking the previous tick-tock model. Actually, it is not that different from the preceding Skylake: it has 64kB of L1 cache and 256kB L2 cache per core.
Using the multithread performance as a reference, the i5-8250U gets a score of 161.3 k points while the i7-7660U gets 132.8 k points.
Summarizing, the i5-8250U is 1.2 times faster than the i7-7660U. To get a proper comparison between both models, take a look to the data shown below.
Specs
CPUID
806ea
806e9
Core
Kaby Lake-R
Kaby Lake-U
Base frecuency
1.6 GHz
2.5 GHz
Boost frecuency
3.4 GHz
4 GHz
Socket
BGA1356
BGA 1356
Cores/Threads
4/8
2/4
TDP
15 W
15 W
Cache L1 (d+i)
4x32+4x32 kB
2x32+2x32 kB
Cache L2
4x256 kB
2x256 kB
Cache L3
6144 kB
4096 kB
Date
August 2017
January 2017
Mean monothread perf.
54.31k points
57.46k points
Mean multithread perf.
161.26k points
132.81k points
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
i7-7660U
Test#1 (Integers)
22.11k
22.46k (x1.02)
Test#2 (FP)
19.64k
19.29k (x0.98)
Test#3 (Generic, ZIP)
4.54k
4.77k (x1.05)
Test#1 (Memory)
8.03k
10.94k (x1.36)
TOTAL
54.31k
57.46k (x1.06)
Multithread
i5-8250U
i7-7660U
Test#1 (Integers)
74.19k
56.67k (x0.76)
Test#2 (FP)
66.27k
46.95k (x0.71)
Test#3 (Generic, ZIP)
15.97k
12.36k (x0.77)
Test#1 (Memory)
4.83k
16.84k (x3.49)
TOTAL
161.26k
132.81k (x0.82)
Performance/W
i5-8250U
i7-7660U
Test#1 (Integers)
4946 points/W
3778 points/W
Test#2 (FP)
4418 points/W
3130 points/W
Test#3 (Generic, ZIP)
1065 points/W
824 points/W
Test#1 (Memory)
322 points/W
1122 points/W
TOTAL
10751 points/W
8854 points/W
Performance/GHz
i5-8250U
i7-7660U
Test#1 (Integers)
6503 points/GHz
5614 points/GHz
Test#2 (FP)
5777 points/GHz
4823 points/GHz
Test#3 (Generic, ZIP)
1334 points/GHz
1193 points/GHz
Test#1 (Memory)
2361 points/GHz
2735 points/GHz
TOTAL
15975 points/GHz
14365 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.
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]
Test#2 (FP) [points vs time]
Test#3 (Generic, ZIP) [points vs time]
Test#1 (Memory) [points vs time]
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.
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]
Test#2 (FP) [points vs time]
Test#3 (Generic, ZIP) [points vs time]
Test#1 (Memory) [points vs time]
Hardlimit Benchmark Central - Ver. 3.11.4