Xeon E5645 vs Core i5-6400
Description
The E5645 is based on Westmere architecture while the i5-6400 is based on Skylake.
Using the multithread performance as a reference, the E5645 gets a score of 77 k points while the i5-6400 gets 129.5 k points.
Summarizing, the i5-6400 is 1.7 times faster than the E5645 . To get a proper comparison between both models, take a look to the data shown below.
Using the multithread performance as a reference, the E5645 gets a score of 77 k points while the i5-6400 gets 129.5 k points.
Summarizing, the i5-6400 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
206c2
506e3
Core
Westmere-EP
Skylake-S
Base frecuency
2.4 GHz
2.7 GHz
Boost frecuency
2.8 GHz
3.3 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
September 2015
Mean monothread perf.
15.64k points
48.05k points
Mean multithread perf.
76.96k points
174.05k 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
i5-6400
Test#1 (Integers)
1.78k
3.2k (x1.8)
Test#2 (FP)
3.91k
12.81k (x3.27)
Test#3 (Generic, ZIP)
2.52k
4.18k (x1.66)
Test#1 (Memory)
2.42k
4.3k (x1.78)
TOTAL
10.64k
24.49k (x2.3)
Multithread
E5645
i5-6400
Test#1 (Integers)
9.67k
11.45k (x1.18)
Test#2 (FP)
22.92k
46.67k (x2.04)
Test#3 (Generic, ZIP)
14.31k
14.69k (x1.03)
Test#1 (Memory)
3.81k
5.92k (x1.56)
TOTAL
50.7k
78.73k (x1.55)
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
i5-6400
Test#1 (Integers)
6.47k
11.56k (x1.79)
Test#2 (FP)
4.4k
16.53k (x3.75)
Test#3 (Generic, ZIP)
2.43k
4.3k (x1.77)
Test#1 (Memory)
2.33k
3.97k (x1.7)
TOTAL
15.64k
36.36k (x2.33)
Multithread
E5645
i5-6400
Test#1 (Integers)
34.43k
43.01k (x1.25)
Test#2 (FP)
24.23k
64.46k (x2.66)
Test#3 (Generic, ZIP)
14.48k
16.14k (x1.11)
Test#1 (Memory)
3.81k
5.91k (x1.55)
TOTAL
76.96k
129.51k (x1.68)
Performance/W
E5645
i5-6400
Test#1 (Integers)
430 points/W
662 points/W
Test#2 (FP)
303 points/W
992 points/W
Test#3 (Generic, ZIP)
181 points/W
248 points/W
Test#1 (Memory)
48 points/W
91 points/W
TOTAL
962 points/W
1992 points/W
Performance/GHz
E5645
i5-6400
Test#1 (Integers)
2311 points/GHz
3503 points/GHz
Test#2 (FP)
1573 points/GHz
5009 points/GHz
Test#3 (Generic, ZIP)
867 points/GHz
1302 points/GHz
Test#1 (Memory)
833 points/GHz
1203 points/GHz
TOTAL
5584 points/GHz
11018 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.
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]
Test#2 (FP) [points vs time]
Test#3 (Generic, ZIP) [points vs time]
Test#1 (Memory) [points vs time]
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.
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]
Test#2 (FP) [points vs time]
Test#3 (Generic, ZIP) [points vs time]
Test#1 (Memory) [points vs time]
Hardlimit Benchmark Central - Ver. 3.11.4