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Core i7-8550U vs Xeon E5645


Description
The i7-8550U is based on Kaby Lake architecture while the E5645 is based on Westmere.

Using the multithread performance as a reference, the i7-8550U gets a score of 127.9 k points while the E5645 gets 77 k points.

Summarizing, the i7-8550U is 1.7 times faster than the E5645 . To get a proper comparison between both models, take a look to the data shown below.

Specs
CPUID
806ea
206c2
Core
Kaby Lake-R
Westmere-EP
Architecture
Base frecuency
1.8 GHz
2.4 GHz
Boost frecuency
4 GHz
2.8 GHz
Socket
BGA1356
LGA 1366
Cores/Threads
4/8
6 /6
TDP
15 W
80 W
Cache L1 (d+i)
4x32+4x32 kB
64 kB
Cache L2
4x256 kB
256 kB
Cache L3
8192 kB
12288 kB
Date
August 2017
March 2010
Mean monothread perf.
64.2k points
15.64k points
Mean multithread perf.
166.12k 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
i7-8550U
E5645
Test#1 (Integers)
3.91k
1.78k (x0.45)
Test#2 (FP)
15.98k
3.91k (x0.24)
Test#3 (Generic, ZIP)
5.11k
2.52k (x0.49)
Test#1 (Memory)
11.05k
2.42k (x0.22)
TOTAL
36.05k
10.64k (x0.3)

Multithread

i7-8550U

E5645
Test#1 (Integers)
11.76k
9.67k (x0.82)
Test#2 (FP)
50.15k
22.92k (x0.46)
Test#3 (Generic, ZIP)
16.76k
14.31k (x0.85)
Test#1 (Memory)
4.17k
3.81k (x0.91)
TOTAL
82.84k
50.7k (x0.61)

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
i7-8550U
E5645
Test#1 (Integers)
12.93k
6.47k (x0.5)
Test#2 (FP)
20.59k
4.4k (x0.21)
Test#3 (Generic, ZIP)
5.41k
2.43k (x0.45)
Test#1 (Memory)
10.48k
2.33k (x0.22)
TOTAL
49.41k
15.64k (x0.32)

Multithread

i7-8550U

E5645
Test#1 (Integers)
41.11k
34.43k (x0.84)
Test#2 (FP)
65.04k
24.23k (x0.37)
Test#3 (Generic, ZIP)
17.53k
14.48k (x0.83)
Test#1 (Memory)
4.22k
3.81k (x0.9)
TOTAL
127.9k
76.96k (x0.6)

Performance/W
i7-8550U
E5645
Test#1 (Integers)
2741 points/W
430 points/W
Test#2 (FP)
4336 points/W
303 points/W
Test#3 (Generic, ZIP)
1169 points/W
181 points/W
Test#1 (Memory)
281 points/W
48 points/W
TOTAL
8527 points/W
962 points/W

Performance/GHz
i7-8550U
E5645
Test#1 (Integers)
3232 points/GHz
2311 points/GHz
Test#2 (FP)
5147 points/GHz
1573 points/GHz
Test#3 (Generic, ZIP)
1353 points/GHz
867 points/GHz
Test#1 (Memory)
2620 points/GHz
833 points/GHz
TOTAL
12351 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