Core i5-6400 vs Xeon E5645
Description
The i5-6400 is based on Skylake architecture while the E5645 is based on Westmere.
Using the multithread performance as a reference, the i5-6400 gets a score of 129.5 k points while the E5645 gets 77 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 i5-6400 gets a score of 129.5 k points while the E5645 gets 77 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
506e3
206c2
Core
Skylake-S
Westmere-EP
Base frecuency
2.7 GHz
2.4 GHz
Boost frecuency
3.3 GHz
2.8 GHz
Socket
LGA 1151
LGA 1366
Cores/Threads
4/4
6 /6
TDP
65 W
80 W
Cache L1 (d+i)
4x32+4x32 kB
64 kB
Cache L2
4x256 kB
256 kB
Cache L3
6144 kB
12288 kB
Date
September 2015
March 2010
Mean monothread perf.
48.05k points
15.64k points
Mean multithread perf.
174.05k 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
i5-6400
E5645
Test#1 (Integers)
3.2k
1.78k (x0.56)
Test#2 (FP)
12.81k
3.91k (x0.31)
Test#3 (Generic, ZIP)
4.18k
2.52k (x0.6)
Test#1 (Memory)
4.3k
2.42k (x0.56)
TOTAL
24.49k
10.64k (x0.43)
Multithread
i5-6400
E5645
Test#1 (Integers)
11.45k
9.67k (x0.84)
Test#2 (FP)
46.67k
22.92k (x0.49)
Test#3 (Generic, ZIP)
14.69k
14.31k (x0.97)
Test#1 (Memory)
5.92k
3.81k (x0.64)
TOTAL
78.73k
50.7k (x0.64)
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
i5-6400
E5645
Test#1 (Integers)
11.56k
6.47k (x0.56)
Test#2 (FP)
16.53k
4.4k (x0.27)
Test#3 (Generic, ZIP)
4.3k
2.43k (x0.57)
Test#1 (Memory)
3.97k
2.33k (x0.59)
TOTAL
36.36k
15.64k (x0.43)
Multithread
i5-6400
E5645
Test#1 (Integers)
43.01k
34.43k (x0.8)
Test#2 (FP)
64.46k
24.23k (x0.38)
Test#3 (Generic, ZIP)
16.14k
14.48k (x0.9)
Test#1 (Memory)
5.91k
3.81k (x0.65)
TOTAL
129.51k
76.96k (x0.59)
Performance/W
i5-6400
E5645
Test#1 (Integers)
662 points/W
430 points/W
Test#2 (FP)
992 points/W
303 points/W
Test#3 (Generic, ZIP)
248 points/W
181 points/W
Test#1 (Memory)
91 points/W
48 points/W
TOTAL
1992 points/W
962 points/W
Performance/GHz
i5-6400
E5645
Test#1 (Integers)
3503 points/GHz
2311 points/GHz
Test#2 (FP)
5009 points/GHz
1573 points/GHz
Test#3 (Generic, ZIP)
1302 points/GHz
867 points/GHz
Test#1 (Memory)
1203 points/GHz
833 points/GHz
TOTAL
11018 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.
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