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Core i7-6900K vs i5-7400T


Description
The i7-6900K is based on Broadwell architecture while the i5-7400T is based on Kaby Lake.

Using the multithread performance as a reference, the i7-6900K gets a score of 427.5 k points while the i5-7400T gets 163.4 k points.

Summarizing, the i7-6900K is 2.6 times faster than the i5-7400T. To get a proper comparison between both models, take a look to the data shown below.

Specs
CPUID
406f1
906e9
Core
Broadwell-E
Kaby Lake-S
Architecture
Base frecuency
3.2 GHz
2.4 GHz
Boost frecuency
3.7 GHz
3 GHz
Socket
LGA 2011-3
LGA 1151
Cores/Threads
8/16
4/4
TDP
140 W
35 W
Cache L1 (d+i)
8x32+8x32 kB
4x32+4x32 kB
Cache L2
8x256 kB
4x256 kB
Cache L3
20480 kB
6144 kB
Date
September 2016
January 2017
Mean monothread perf.
49.76k points
49.16k points
Mean multithread perf.
427.51k points
163.4k 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
i7-6900K
i5-7400T
Test#1 (Integers)
23.11k
19.7k (x0.85)
Test#2 (FP)
17.84k
17.29k (x0.97)
Test#3 (Generic, ZIP)
5.34k
4.07k (x0.76)
Test#1 (Memory)
3.47k
8.1k (x2.34)
TOTAL
49.76k
49.16k (x0.99)

Multithread

i7-6900K

i5-7400T
Test#1 (Integers)
184.19k
75.27k (x0.41)
Test#2 (FP)
181.2k
66.24k (x0.37)
Test#3 (Generic, ZIP)
47.44k
13.93k (x0.29)
Test#1 (Memory)
14.69k
7.95k (x0.54)
TOTAL
427.51k
163.4k (x0.38)

Performance/W
i7-6900K
i5-7400T
Test#1 (Integers)
1316 points/W
2151 points/W
Test#2 (FP)
1294 points/W
1893 points/W
Test#3 (Generic, ZIP)
339 points/W
398 points/W
Test#1 (Memory)
105 points/W
227 points/W
TOTAL
3054 points/W
4669 points/W

Performance/GHz
i7-6900K
i5-7400T
Test#1 (Integers)
6247 points/GHz
6568 points/GHz
Test#2 (FP)
4822 points/GHz
5764 points/GHz
Test#3 (Generic, ZIP)
1444 points/GHz
1356 points/GHz
Test#1 (Memory)
938 points/GHz
2700 points/GHz
TOTAL
13450 points/GHz
16388 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