Core i7-870 vs Xeon E5645
Description
The i7-870 is based on Nehalem architecture while the E5645 is based on Westmere.
Using the multithread performance as a reference, the i7-870 gets a score of 67.1 k points while the E5645 gets 77 k points.
Summarizing, the E5645 is 1.1 times faster than the i7-870 . To get a proper comparison between both models, take a look to the data shown below.
Using the multithread performance as a reference, the i7-870 gets a score of 67.1 k points while the E5645 gets 77 k points.
Summarizing, the E5645 is 1.1 times faster than the i7-870 . To get a proper comparison between both models, take a look to the data shown below.
Specs
CPUID
106e5
206c2
Core
Lynnfield
Westmere-EP
Base frecuency
2.933 GHz
2.4 GHz
Boost frecuency
3.6 GHz
2.8 GHz
Socket
LGA 1156
LGA 1366
Cores/Threads
4/8
6 /6
TDP
95 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
September 2009
March 2010
Mean monothread perf.
18.13k points
15.64k points
Mean multithread perf.
67.13k 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
i7-870
E5645
Test#1 (Integers)
1.98k
1.78k (x0.9)
Test#2 (FP)
4.36k
3.91k (x0.9)
Test#3 (Generic, ZIP)
2.24k
2.52k (x1.13)
Test#1 (Memory)
2.72k
2.42k (x0.89)
TOTAL
11.3k
10.64k (x0.94)
Multithread
i7-870
E5645
Test#1 (Integers)
4.46k
9.67k (x2.17)
Test#2 (FP)
13.95k
22.92k (x1.64)
Test#3 (Generic, ZIP)
7.54k
14.31k (x1.9)
Test#1 (Memory)
1.7k
3.81k (x2.24)
TOTAL
27.65k
50.7k (x1.83)
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
i7-870
E5645
Test#1 (Integers)
7.43k
6.47k (x0.87)
Test#2 (FP)
4.96k
4.4k (x0.89)
Test#3 (Generic, ZIP)
2.7k
2.43k (x0.9)
Test#1 (Memory)
3.04k
2.33k (x0.77)
TOTAL
18.13k
15.64k (x0.86)
Multithread
i7-870
E5645
Test#1 (Integers)
27.58k
34.43k (x1.25)
Test#2 (FP)
21.84k
24.23k (x1.11)
Test#3 (Generic, ZIP)
13.55k
14.48k (x1.07)
Test#1 (Memory)
4.16k
3.81k (x0.92)
TOTAL
67.13k
76.96k (x1.15)
Performance/W
i7-870
E5645
Test#1 (Integers)
290 points/W
430 points/W
Test#2 (FP)
230 points/W
303 points/W
Test#3 (Generic, ZIP)
143 points/W
181 points/W
Test#1 (Memory)
44 points/W
48 points/W
TOTAL
707 points/W
962 points/W
Performance/GHz
i7-870
E5645
Test#1 (Integers)
2063 points/GHz
2311 points/GHz
Test#2 (FP)
1379 points/GHz
1573 points/GHz
Test#3 (Generic, ZIP)
750 points/GHz
867 points/GHz
Test#1 (Memory)
845 points/GHz
833 points/GHz
TOTAL
5037 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