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Core i7-7700K vs i7-8550U


Description
Both models i7-7700K and i7-8550U 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 i7-7700K gets a score of 289.9 k points while the i7-8550U gets 166.1 k points.

Summarizing, the i7-7700K is 1.7 times faster than the i7-8550U. To get a proper comparison between both models, take a look to the data shown below.

Specs
CPUID
906e9
806ea
Core
Kaby Lake-S
Kaby Lake-R
Architecture
Base frecuency
4.2 GHz
1.8 GHz
Boost frecuency
4.5 GHz
4 GHz
Socket
LGA 1151
BGA1356
Cores/Threads
4/8
4/8
TDP
95 W
15 W
Cache L1 (d+i)
32+32 kB
4x32+4x32 kB
Cache L2
256 kB
4x256 kB
Cache L3
8192 kB
8192 kB
Date
September 2016
August 2017
Mean monothread perf.
76.98k points
64.2k points
Mean multithread perf.
289.9k points
166.12k 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
i7-7700K
i7-8550U
Test#1 (Integers)
4.63k
3.91k (x0.84)
Test#2 (FP)
18.92k
15.98k (x0.84)
Test#3 (Generic, ZIP)
6.22k
5.11k (x0.82)
Test#1 (Memory)
13.92k
11.05k (x0.79)
TOTAL
43.7k
36.05k (x0.82)

Multithread

i7-7700K

i7-8550U
Test#1 (Integers)
18.53k
11.76k (x0.63)
Test#2 (FP)
86.49k
50.15k (x0.58)
Test#3 (Generic, ZIP)
28.78k
16.76k (x0.58)
Test#1 (Memory)
9.67k
4.17k (x0.43)
TOTAL
143.47k
82.84k (x0.58)

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
i7-7700K
i7-8550U
Test#1 (Integers)
17.55k
13.15k (x0.75)
Test#2 (FP)
27.82k
19.7k (x0.71)
Test#3 (Generic, ZIP)
6.8k
5.1k (x0.75)
Test#1 (Memory)
14.83k
9.21k (x0.62)
TOTAL
67k
47.16k (x0.7)

Multithread

i7-7700K

i7-8550U
Test#1 (Integers)
68.4k
34.13k (x0.5)
Test#2 (FP)
118.8k
53.79k (x0.45)
Test#3 (Generic, ZIP)
33.34k
13.91k (x0.42)
Test#1 (Memory)
17.43k
4.12k (x0.24)
TOTAL
237.97k
105.95k (x0.45)

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
i7-7700K
i7-8550U
Test#1 (Integers)
30.47k
25.37k (x0.83)
Test#2 (FP)
26.94k
22.6k (x0.84)
Test#3 (Generic, ZIP)
6.25k
5.13k (x0.82)
Test#1 (Memory)
13.32k
11.1k (x0.83)
TOTAL
76.98k
64.2k (x0.83)

Multithread

i7-7700K

i7-8550U
Test#1 (Integers)
127.81k
72.82k (x0.57)
Test#2 (FP)
123.7k
71.71k (x0.58)
Test#3 (Generic, ZIP)
29.34k
17.35k (x0.59)
Test#1 (Memory)
9.05k
4.24k (x0.47)
TOTAL
289.9k
166.12k (x0.57)

Performance/W
i7-7700K
i7-8550U
Test#1 (Integers)
1345 points/W
4855 points/W
Test#2 (FP)
1302 points/W
4781 points/W
Test#3 (Generic, ZIP)
309 points/W
1157 points/W
Test#1 (Memory)
95 points/W
282 points/W
TOTAL
3052 points/W
11075 points/W

Performance/GHz
i7-7700K
i7-8550U
Test#1 (Integers)
6770 points/GHz
6343 points/GHz
Test#2 (FP)
5987 points/GHz
5650 points/GHz
Test#3 (Generic, ZIP)
1389 points/GHz
1282 points/GHz
Test#1 (Memory)
2960 points/GHz
2774 points/GHz
TOTAL
17106 points/GHz
16049 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