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Core i5-6600K vs Xeon E5-2651 v2


Description
The i5-6600K is based on Skylake architecture while the E5-2651 v2 is based on Ivy Bridge.

Using the multithread performance as a reference, the i5-6600K gets a score of 209.3 k points while the E5-2651 v2 gets 426.2 k points.

Summarizing, the E5-2651 v2 is 2 times faster than the i5-6600K . To get a proper comparison between both models, take a look to the data shown below.

Specs
CPUID
506e3
306e4
Core
Skylake-S
Ivy Bridge-EP
Architecture
Base frecuency
3.5 GHz
1.8 GHz
Boost frecuency
3.9 GHz
2.2 GHz
Socket
LGA 1151
LGA 2011
Cores/Threads
4/4
12/24
TDP
95 W
W
Cache L1 (d+i)
4x32+4x32 kB
12x32+12x32 kB
Cache L2
256 kB
12x256 kB
Cache L3
6144 kB
30720 kB
Date
May 2015
October 2013
Mean monothread perf.
59.28k points
17.75k points
Mean multithread perf.
209.28k points
426.18k 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
i5-6600K
E5-2651 v2
Test#1 (Integers)
17.24k
6.69k (x0.39)
Test#2 (FP)
26.5k
6.35k (x0.24)
Test#3 (Generic, ZIP)
6.45k
2.54k (x0.39)
Test#1 (Memory)
9.09k
2.17k (x0.24)
TOTAL
59.28k
17.75k (x0.3)

Multithread

i5-6600K

E5-2651 v2
Test#1 (Integers)
68.47k
165.17k (x2.41)
Test#2 (FP)
105.05k
176.85k (x1.68)
Test#3 (Generic, ZIP)
25.24k
73.91k (x2.93)
Test#1 (Memory)
10.5k
10.25k (x0.98)
TOTAL
209.28k
426.18k (x2.04)

Performance/W
i5-6600K
E5-2651 v2
Test#1 (Integers)
721 points/W