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Core i7-6600U vs Xeon E3-1220 v3


Description
The i7-6600U is based on Skylake architecture while the E3-1220 v3 is based on Haswell.

Using the multithread performance as a reference, the i7-6600U gets a score of 79.2 k points while the E3-1220 v3 gets 140.8 k points.

Summarizing, the E3-1220 v3 is 1.8 times faster than the i7-6600U. To get a proper comparison between both models, take a look to the data shown below.

Specs
CPUID
406e3
306c3
Core
Skylake-U
Haswell-WS
Architecture
Base frecuency
2.6 GHz
3.1 GHz
Boost frecuency
3.4 GHz
3.5 GHz
Socket
BGA1356
LGA 1150
Cores/Threads
2/4
4 /4
TDP
15 W
80 W
Cache L1 (d+i)
2x32+2x32 kB
64 kB
Cache L2
2x256 kB
256 kB
Cache L3
4096 kB
8192 kB
Date
September 2015
June 2013
Mean monothread perf.
39.73k points
39.16k points
Mean multithread perf.
79.22k points
140.76k 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
i7-6600U
E3-1220 v3
Test#1 (Integers)
2.75k
3.45k (x1.25)
Test#2 (FP)
12.23k
9.96k (x0.81)
Test#3 (Generic, ZIP)
3.9k
4.26k (x1.09)
Test#1 (Memory)
5.61k
4.27k (x0.76)
TOTAL
24.48k
21.94k (x0.9)

Multithread

i7-6600U

E3-1220 v3
Test#1 (Integers)
5.23k
14.01k (x2.68)
Test#2 (FP)
25k
37.68k (x1.51)
Test#3 (Generic, ZIP)
8.98k
17.05k (x1.9)
Test#1 (Memory)
4.73k
7.35k (x1.55)
TOTAL
43.95k
76.09k (x1.73)

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
i7-6600U
E3-1220 v3
Test#1 (Integers)
16.72k
19.17k (x1.15)
Test#2 (FP)
14.7k
10.55k (x0.72)
Test#3 (Generic, ZIP)
3.4k
4.79k (x1.41)
Test#1 (Memory)
4.9k
4.65k (x0.95)
TOTAL
39.73k
39.16k (x0.99)

Multithread

i7-6600U

E3-1220 v3
Test#1 (Integers)
33.41k
73.13k (x2.19)
Test#2 (FP)
31.66k
42.06k (x1.33)
Test#3 (Generic, ZIP)
8.18k
18.03k (x2.2)
Test#1 (Memory)
5.97k
7.54k (x1.26)
TOTAL
79.22k
140.76k (x1.78)

Performance/W
i7-6600U
E3-1220 v3
Test#1 (Integers)
2227 points/W
914 points/W
Test#2 (FP)
2111 points/W
526 points/W
Test#3 (Generic, ZIP)
546 points/W
225 points/W
Test#1 (Memory)
398 points/W
94 points/W
TOTAL
5282 points/W
1759 points/W

Performance/GHz
i7-6600U
E3-1220 v3
Test#1 (Integers)
4919 points/GHz
5478 points/GHz
Test#2 (FP)
4325 points/GHz
3014 points/GHz
Test#3 (Generic, ZIP)
999 points/GHz
1368 points/GHz
Test#1 (Memory)
1441 points/GHz
1328 points/GHz
TOTAL
11684 points/GHz
11188 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