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Core i7-3930K vs i5-6400


Description
The i7-3930K is based on Sandy Bridge architecture while the i5-6400 is based on Skylake.

Using the multithread performance as a reference, the i7-3930K gets a score of 155.9 k points while the i5-6400 gets 139.6 k points.

Summarizing, the i7-3930K is 1.1 times faster than the i5-6400 . To get a proper comparison between both models, take a look to the data shown below.

Specs
CPUID
206d7
506e3
Core
Sandy Bridge-E
Skylake-S
Architecture
Base frecuency
3.2 GHz
2.7 GHz
Boost frecuency
3.8 GHz
3.3 GHz
Socket
LGA 2011
LGA 1151
Cores/Threads
6/12
4/4
TDP
130 W
65 W
Cache L1 (d+i)
32+32 kB
4x32+4x32 kB
Cache L2
256 kB
4x256 kB
Cache L3
12288 kB
6144 kB
Date
November 2011
September 2015
Mean monothread perf.
27.76k points
48.05k points
Mean multithread perf.
155.86k points
174.05k points

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
i7-3930K
i5-6400
Test#1 (Integers)
10.08k
11.82k (x1.17)
Test#2 (FP)
9.06k
18.36k (x2.03)
Test#3 (Generic, ZIP)
4.45k
4.43k (x0.99)
Test#1 (Memory)
4.16k
4.95k (x1.19)
TOTAL
27.76k
39.56k (x1.43)

Multithread

i7-3930K

i5-6400
Test#1 (Integers)
62.22k
46.04k (x0.74)
Test#2 (FP)
60.25k
69.47k (x1.15)
Test#3 (Generic, ZIP)
30.42k
16.33k (x0.54)
Test#1 (Memory)
2.97k
7.74k (x2.6)
TOTAL
155.86k
139.58k (x0.9)

Performance/W
i7-3930K
i5-6400
Test#1 (Integers)
479 points/W
708 points/W
Test#2 (FP)
463 points/W
1069 points/W
Test#3 (Generic, ZIP)
234 points/W
251 points/W
Test#1 (Memory)
23 points/W
119 points/W
TOTAL
1199 points/W
2147 points/W

Performance/GHz
i7-3930K
i5-6400
Test#1 (Integers)
2653 points/GHz
3583 points/GHz
Test#2 (FP)
2383 points/GHz
5563 points/GHz
Test#3 (Generic, ZIP)
1172 points/GHz
1341 points/GHz
Test#1 (Memory)
1096 points/GHz
1500 points/GHz
TOTAL
7304 points/GHz
11987 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