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Core i3-7100 vs Xeon E5645


Description
The i3-7100 is based on Kaby Lake architecture while the E5645 is based on Westmere.

Using the multithread performance as a reference, the i3-7100 gets a score of 94.6 k points while the E5645 gets 77 k points.

Summarizing, the i3-7100 is 1.2 times faster than the E5645 . To get a proper comparison between both models, take a look to the data shown below.

Specs
CPUID
906e9
206c2
Core
Kaby Lake-S
Westmere-EP
Architecture
Base frecuency
3.9 GHz
2.4 GHz
Boost frecuency
3.9 GHz
2.8 GHz
Socket
LGA 1151
LGA 1366
Cores/Threads
2/4
6 /6
TDP
51 W
80 W
Cache L1 (d+i)
2x32+2x32 kB
64 kB
Cache L2
2x256 kB
256 kB
Cache L3
3072 kB
12288 kB
Date
January 2017
March 2010
Mean monothread perf.
58.55k points
15.64k points
Mean multithread perf.
126.47k points
76.96k 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
i3-7100
E5645
Test#1 (Integers)
4.01k
1.78k (x0.44)
Test#2 (FP)
16.38k
3.91k (x0.24)
Test#3 (Generic, ZIP)
5.31k
2.52k (x0.48)
Test#1 (Memory)
3.98k
2.42k (x0.61)
TOTAL
29.69k
10.64k (x0.36)

Multithread

i3-7100

E5645
Test#1 (Integers)
8.1k
9.67k (x1.19)
Test#2 (FP)
38.7k
22.92k (x0.59)
Test#3 (Generic, ZIP)
12.69k
14.31k (x1.13)
Test#1 (Memory)
3.76k
3.81k (x1.01)
TOTAL
63.24k
50.7k (x0.8)

SSE3 optimized benchmark
The benchmark in mode I (SSE) is optimized for the use of SIMD instructions with 128 bits register and the SSE set up to version 3. Nearly every modern CPU has support for this mode.
Monothread
i3-7100
E5645
Test#1 (Integers)
14.04k
6.47k (x0.46)
Test#2 (FP)
20.55k
4.4k (x0.21)
Test#3 (Generic, ZIP)
5.41k
2.43k (x0.45)
Test#1 (Memory)
3.99k
2.33k (x0.58)
TOTAL
43.99k
15.64k (x0.36)

Multithread

i3-7100

E5645
Test#1 (Integers)
30.09k
34.43k (x1.14)
Test#2 (FP)
47.84k
24.23k (x0.51)
Test#3 (Generic, ZIP)
13.13k
14.48k (x1.1)
Test#1 (Memory)
3.52k
3.81k (x1.08)
TOTAL
94.59k
76.96k (x0.81)

Performance/W
i3-7100
E5645
Test#1 (Integers)
590 points/W
430 points/W
Test#2 (FP)
938 points/W
303 points/W
Test#3 (Generic, ZIP)
258 points/W
181 points/W
Test#1 (Memory)
69 points/W
48 points/W
TOTAL
1855 points/W
962 points/W

Performance/GHz
i3-7100
E5645
Test#1 (Integers)
3601 points/GHz
2311 points/GHz
Test#2 (FP)
5268 points/GHz
1573 points/GHz
Test#3 (Generic, ZIP)
1386 points/GHz
867 points/GHz
Test#1 (Memory)
1024 points/GHz
833 points/GHz
TOTAL
11279 points/GHz
5584 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