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Pentium 4405U vs Xeon E5645


Description
The 4405U is based on Skylake architecture while the E5645 is based on Westmere.

Using the multithread performance as a reference, the 4405U gets a score of 51.1 k points while the E5645 gets 77 k points.

Summarizing, the E5645 is 1.5 times faster than the 4405U. To get a proper comparison between both models, take a look to the data shown below.

Specs
CPUID
406e3
206c2
Core
Skylake-U
Westmere-EP
Architecture
Base frecuency
2.1 GHz
2.4 GHz
Boost frecuency
2.1 GHz
2.8 GHz
Socket
BGA 1356
LGA 1366
Cores/Threads
2/4
6 /6
TDP
15 W
80 W
Cache L1 (d+i)
2x32+2x32 kB
64 kB
Cache L2
2x256 kB
256 kB
Cache L3
2048 kB
12288 kB
Date
March 2010
Mean monothread perf.
23.33k points
15.64k points
Mean multithread perf.
51.1k points
76.96k points

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
4405U
E5645
Test#1 (Integers)
7.45k
6.47k (x0.87)
Test#2 (FP)
10.51k
4.4k (x0.42)
Test#3 (Generic, ZIP)
2.78k
2.43k (x0.87)
Test#1 (Memory)
2.59k
2.33k (x0.9)
TOTAL
23.33k
15.64k (x0.67)

Multithread

4405U

E5645
Test#1 (Integers)
16.1k
34.43k (x2.14)
Test#2 (FP)
25.44k
24.23k (x0.95)
Test#3 (Generic, ZIP)
6.99k
14.48k (x2.07)
Test#1 (Memory)
2.58k
3.81k (x1.48)
TOTAL
51.1k
76.96k (x1.51)

Performance/W
4405U
E5645
Test#1 (Integers)
1073 points/W
430 points/W
Test#2 (FP)
1696 points/W
303 points/W
Test#3 (Generic, ZIP)
466 points/W
181 points/W
Test#1 (Memory)
172 points/W
48 points/W
TOTAL
3407 points/W
962 points/W

Performance/GHz
4405U
E5645
Test#1 (Integers)
3547 points/GHz
2311 points/GHz
Test#2 (FP)
5007 points/GHz
1573 points/GHz
Test#3 (Generic, ZIP)
1324 points/GHz
867 points/GHz
Test#1 (Memory)
1232 points/GHz
833 points/GHz
TOTAL
11109 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