Core i7-720QM vs Core 2 Duo E8400
Description
The i7-720QM is based on Nehalem architecture while the E8400 is based on Core.
Using the multithread performance as a reference, the i7-720QM gets a score of 38.8 k points while the E8400 gets 27.1 k points.
Summarizing, the i7-720QM is 1.4 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 i7-720QM gets a score of 38.8 k points while the E8400 gets 27.1 k points.
Summarizing, the i7-720QM is 1.4 times faster than the E8400 . To get a proper comparison between both models, take a look to the data shown below.
Specs
CPUID
106e5
1067a
Core
Clarksfield
Wolfdale
Base frecuency
1.6 GHz
3 GHz
Boost frecuency
2.8 GHz
3 GHz
Socket
988-pin micro-FCPGA8
LGA 775
Cores/Threads
4/8
2/2
TDP
45 W
65 W
Cache L1 (d+i)
4x32+4x32 kB
2x32+2x32 kB
Cache L2
4x256 kB
6144 kB
Cache L3
6144 kB
0 kB
Date
September 2009
January 2008
Mean monothread perf.
13.13k points
17.28k points
Mean multithread perf.
38.78k 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
i7-720QM
E8400
Test#1 (Integers)
1.49k
2.47k (x1.66)
Test#2 (FP)
3.4k
6.74k (x1.98)
Test#3 (Generic, ZIP)
1.95k
2.87k (x1.47)
Test#1 (Memory)
2.08k
4.47k (x2.15)
TOTAL
8.92k
16.55k (x1.85)
Multithread
i7-720QM
E8400
Test#1 (Integers)
4.23k
4.64k (x1.1)
Test#2 (FP)
11.4k
12.36k (x1.08)
Test#3 (Generic, ZIP)
7.17k
4.86k (x0.68)
Test#1 (Memory)
4.51k
1.96k (x0.43)
TOTAL
27.32k
23.82k (x0.87)
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
i7-720QM
E8400
Test#1 (Integers)
5.49k
3.3k (x0.6)
Test#2 (FP)
3.55k
7.28k (x2.05)
Test#3 (Generic, ZIP)
2.01k
2.88k (x1.43)
Test#1 (Memory)
2.09k
3.83k (x1.84)
TOTAL
13.13k
17.28k (x1.32)
Multithread
i7-720QM
E8400
Test#1 (Integers)
15.06k
6.3k (x0.42)
Test#2 (FP)
12.15k
13.71k (x1.13)
Test#3 (Generic, ZIP)
7.18k
5.32k (x0.74)
Test#1 (Memory)
4.39k
1.78k (x0.4)
TOTAL
38.78k
27.11k (x0.7)
Performance/W
i7-720QM
E8400
Test#1 (Integers)
335 points/W
97 points/W
Test#2 (FP)
270 points/W
211 points/W
Test#3 (Generic, ZIP)
160 points/W
82 points/W
Test#1 (Memory)
98 points/W
27 points/W
TOTAL
862 points/W
417 points/W
Performance/GHz
i7-720QM
E8400
Test#1 (Integers)
1962 points/GHz
1099 points/GHz
Test#2 (FP)
1267 points/GHz
2426 points/GHz
Test#3 (Generic, ZIP)
717 points/GHz
959 points/GHz
Test#1 (Memory)
745 points/GHz
1278 points/GHz
TOTAL
4691 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