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Core i5-7400T vs i7-6900K


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

Using the multithread performance as a reference, the i5-7400T gets a score of 163.4 k points while the i7-6900K gets 427.5 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
906e9
406f1
Core
Kaby Lake-S
Broadwell-E
Architecture
Base frecuency
2.4 GHz
3.2 GHz
Boost frecuency
3 GHz
3.7 GHz
Socket
LGA 1151
LGA 2011-3
Cores/Threads
4/4
8/16
TDP
35 W
140 W
Cache L1 (d+i)
4x32+4x32 kB
8x32+8x32 kB
Cache L2
4x256 kB
8x256 kB
Cache L3
6144 kB
20480 kB
Date
January 2017
September 2016
Mean monothread perf.
49.16k points
49.76k points
Mean multithread perf.
163.4k points
427.51k 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
i5-7400T
i7-6900K
Test#1 (Integers)
19.7k
23.11k (x1.17)
Test#2 (FP)
17.29k
17.84k (x1.03)
Test#3 (Generic, ZIP)
4.07k
5.34k (x1.31)
Test#1 (Memory)
8.1k
3.47k (x0.43)
TOTAL
49.16k
49.76k (x1.01)

Multithread

i5-7400T

i7-6900K
Test#1 (Integers)
75.27k
184.19k (x2.45)
Test#2 (FP)
66.24k
181.2k (x2.74)
Test#3 (Generic, ZIP)
13.93k
47.44k (x3.41)
Test#1 (Memory)
7.95k
14.69k (x1.85)
TOTAL
163.4k
427.51k (x2.62)

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

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