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Xeon E5645 vs Core i3-8100


Description
The E5645 is based on Westmere architecture while the i3-8100 is based on Coffee Lake.

Using the multithread performance as a reference, the E5645 gets a score of 77 k points while the i3-8100 gets 152.9 k points.

Summarizing, the i3-8100 is 2 times faster than the E5645 . To get a proper comparison between both models, take a look to the data shown below.

Specs
CPUID
206c2
906eb
Core
Westmere-EP
Coffee Lake-S
Architecture
Base frecuency
2.4 GHz
3.6 GHz
Boost frecuency
2.8 GHz
3.6 GHz
Socket
LGA 1366
LGA 1151
Cores/Threads
6 /6
4/4
TDP
80 W
65 W
Cache L1 (d+i)
64 kB
4x32+4x32 kB
Cache L2
256 kB
4x256 kB
Cache L3
12288 kB
6144 kB
Date
March 2010
October 2017
Mean monothread perf.
15.64k points
59.18k points
Mean multithread perf.
76.96k points
200.4k 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
E5645
i3-8100
Test#1 (Integers)
1.78k
3.72k (x2.09)
Test#2 (FP)
3.91k
15.33k (x3.92)
Test#3 (Generic, ZIP)
2.52k
4.71k (x1.87)
Test#1 (Memory)
2.42k
6.76k (x2.79)
TOTAL
10.64k
30.52k (x2.87)

Multithread

E5645

i3-8100
Test#1 (Integers)
9.67k
14.48k (x1.5)
Test#2 (FP)
22.92k
59.59k (x2.6)
Test#3 (Generic, ZIP)
14.31k
18.07k (x1.26)
Test#1 (Memory)
3.81k
4.3k (x1.13)
TOTAL
50.7k
96.43k (x1.9)

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
E5645
i3-8100
Test#1 (Integers)
6.47k
13.51k (x2.09)
Test#2 (FP)
4.4k
19.38k (x4.4)
Test#3 (Generic, ZIP)
2.43k
5.06k (x2.08)
Test#1 (Memory)
2.33k
7.87k (x3.37)
TOTAL
15.64k
45.81k (x2.93)

Multithread

E5645

i3-8100
Test#1 (Integers)
34.43k
52.88k (x1.54)
Test#2 (FP)
24.23k
75.92k (x3.13)
Test#3 (Generic, ZIP)
14.48k
19.52k (x1.35)
Test#1 (Memory)
3.81k
4.53k (x1.19)
TOTAL
76.96k
152.86k (x1.99)

Performance/W
E5645
i3-8100
Test#1 (Integers)
430 points/W
814 points/W
Test#2 (FP)
303 points/W
1168 points/W
Test#3 (Generic, ZIP)
181 points/W
300 points/W
Test#1 (Memory)
48 points/W
70 points/W
TOTAL
962 points/W
2352 points/W

Performance/GHz
E5645
i3-8100
Test#1 (Integers)
2311 points/GHz
3753 points/GHz
Test#2 (FP)
1573 points/GHz
5383 points/GHz
Test#3 (Generic, ZIP)
867 points/GHz
1405 points/GHz
Test#1 (Memory)
833 points/GHz
2185 points/GHz
TOTAL
5584 points/GHz
12725 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