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Core i7-7700 vs i7-7700K


Description
Both models i7-7700 and i7-7700K 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 i7-7700 gets a score of 257.5 k points while the i7-7700K gets 289.9 k points.

Summarizing, the i7-7700K is 1.1 times faster than the i7-7700 . To get a proper comparison between both models, take a look to the data shown below.

Specs
CPUID
906e9
906e9
Core
Kaby Lake-S
Kaby Lake-S
Architecture
Base frecuency
3.6 GHz
4.2 GHz
Boost frecuency
4.2 GHz
4.5 GHz
Socket
LGA 1151
LGA 1151
Cores/Threads
4/8
4/8
TDP
65 W
95 W
Cache L1 (d+i)
32+32 kB
32+32 kB
Cache L2
256 kB
256 kB
Cache L3
8192 kB
8192 kB
Date
September 2016
September 2016
Mean monothread perf.
67.33k points
76.98k points
Mean multithread perf.
257.52k points
289.9k 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
i7-7700
i7-7700K
Test#1 (Integers)
4.23k
4.63k (x1.09)
Test#2 (FP)
16.76k
18.92k (x1.13)
Test#3 (Generic, ZIP)
5.42k
6.22k (x1.15)
Test#1 (Memory)
12.23k
13.92k (x1.14)
TOTAL
38.64k
43.7k (x1.13)

Multithread

i7-7700

i7-7700K
Test#1 (Integers)
16.71k
18.53k (x1.11)
Test#2 (FP)
73.1k
86.49k (x1.18)
Test#3 (Generic, ZIP)
25.76k
28.78k (x1.12)
Test#1 (Memory)
7.12k
9.67k (x1.36)
TOTAL
122.68k
143.47k (x1.17)

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
i7-7700
i7-7700K
Test#1 (Integers)
15.34k
17.55k (x1.14)
Test#2 (FP)
23.41k
27.82k (x1.19)
Test#3 (Generic, ZIP)
5.87k
6.8k (x1.16)
Test#1 (Memory)
11.07k
14.83k (x1.34)
TOTAL
55.69k
67k (x1.2)

Multithread

i7-7700

i7-7700K
Test#1 (Integers)
62.68k
68.4k (x1.09)
Test#2 (FP)
105.24k
118.8k (x1.13)
Test#3 (Generic, ZIP)
26.35k
33.34k (x1.26)
Test#1 (Memory)
5.79k
17.43k (x3.01)
TOTAL
200.07k
237.97k (x1.19)

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
i7-7700
i7-7700K
Test#1 (Integers)
26.7k
30.47k (x1.14)
Test#2 (FP)
23.7k
26.94k (x1.14)
Test#3 (Generic, ZIP)
5.46k
6.25k (x1.15)
Test#1 (Memory)
11.48k
13.32k (x1.16)
TOTAL
67.33k
76.98k (x1.14)

Multithread

i7-7700

i7-7700K
Test#1 (Integers)
115.97k
127.81k (x1.1)
Test#2 (FP)
108.43k
123.7k (x1.14)
Test#3 (Generic, ZIP)
26.28k
29.34k (x1.12)
Test#1 (Memory)
6.85k
9.05k (x1.32)
TOTAL
257.52k
289.9k (x1.13)

Performance/W
i7-7700
i7-7700K
Test#1 (Integers)
1784 points/W
1345 points/W
Test#2 (FP)
1668 points/W
1302 points/W
Test#3 (Generic, ZIP)
404 points/W
309 points/W
Test#1 (Memory)
105 points/W
95 points/W
TOTAL
3962 points/W
3052 points/W

Performance/GHz
i7-7700
i7-7700K
Test#1 (Integers)
6356 points/GHz
6770 points/GHz
Test#2 (FP)
5643 points/GHz
5987 points/GHz
Test#3 (Generic, ZIP)
1300 points/GHz
1389 points/GHz
Test#1 (Memory)
2733 points/GHz
2960 points/GHz
TOTAL
16032 points/GHz
17106 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