Xeon E5645 vs Core 2 Duo E8400
Description
The E5645 is based on Westmere architecture while the E8400 is based on Core.
Using the multithread performance as a reference, the E5645 gets a score of 77 k points while the E8400 gets 27.1 k points.
Summarizing, the E5645 is 2.8 times faster than the E8400 . 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 E8400 gets 27.1 k points.
Summarizing, the E5645 is 2.8 times faster than the E8400 . To get a proper comparison between both models, take a look to the data shown below.
Specs
CPUID
206c2
1067a
Core
Westmere-EP
Wolfdale
Base frecuency
2.4 GHz
3 GHz
Boost frecuency
2.8 GHz
3 GHz
Socket
LGA 1366
LGA 775
Cores/Threads
6 /6
2/2
TDP
80 W
65 W
Cache L1 (d+i)
64 kB
2x32+2x32 kB
Cache L2
256 kB
6144 kB
Cache L3
12288 kB
0 kB
Date
March 2010
January 2008
Mean monothread perf.
15.64k points
17.28k points
Mean multithread perf.
76.96k points
27.11k 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
E8400
Test#1 (Integers)
1.78k
2.47k (x1.39)
Test#2 (FP)
3.91k
6.74k (x1.72)
Test#3 (Generic, ZIP)
2.52k
2.87k (x1.14)
Test#1 (Memory)
2.42k
4.47k (x1.84)
TOTAL
10.64k
16.55k (x1.56)
Multithread
E5645
E8400
Test#1 (Integers)
9.67k
4.64k (x0.48)
Test#2 (FP)
22.92k
12.36k (x0.54)
Test#3 (Generic, ZIP)
14.31k
4.86k (x0.34)
Test#1 (Memory)
3.81k
1.96k (x0.52)
TOTAL
50.7k
23.82k (x0.47)
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
E8400
Test#1 (Integers)
6.47k
3.3k (x0.51)
Test#2 (FP)
4.4k
7.28k (x1.65)
Test#3 (Generic, ZIP)
2.43k
2.88k (x1.18)
Test#1 (Memory)
2.33k
3.83k (x1.64)
TOTAL
15.64k
17.28k (x1.11)
Multithread
E5645
E8400
Test#1 (Integers)
34.43k
6.3k (x0.18)
Test#2 (FP)
24.23k
13.71k (x0.57)
Test#3 (Generic, ZIP)
14.48k
5.32k (x0.37)
Test#1 (Memory)
3.81k
1.78k (x0.47)
TOTAL
76.96k
27.11k (x0.35)
Performance/W
E5645
E8400
Test#1 (Integers)
430 points/W
97 points/W
Test#2 (FP)
303 points/W
211 points/W
Test#3 (Generic, ZIP)
181 points/W
82 points/W
Test#1 (Memory)
48 points/W
27 points/W
TOTAL
962 points/W
417 points/W
Performance/GHz
E5645
E8400
Test#1 (Integers)
2311 points/GHz
1099 points/GHz
Test#2 (FP)
1573 points/GHz
2426 points/GHz
Test#3 (Generic, ZIP)
867 points/GHz
959 points/GHz
Test#1 (Memory)
833 points/GHz
1278 points/GHz
TOTAL
5584 points/GHz
5762 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