Core i7-720QM vs Core 2 Quad Q8400
Description
The i7-720QM is based on Nehalem architecture while the Q8400 is based on Core.
Using the multithread performance as a reference, the i7-720QM gets a score of 38.8 k points while the Q8400 gets 51.9 k points.
Summarizing, the Q8400 is 1.3 times faster than the i7-720QM. 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 Q8400 gets 51.9 k points.
Summarizing, the Q8400 is 1.3 times faster than the i7-720QM. To get a proper comparison between both models, take a look to the data shown below.
Specs
CPUID
106e5
1067a
Core
Clarksfield
Yorkfield
Base frecuency
1.6 GHz
2.666 GHz
Boost frecuency
2.8 GHz
2.666 GHz
Socket
988-pin micro-FCPGA8
LGA 775
Cores/Threads
4/8
4/4
TDP
45 W
95 W
Cache L1 (d+i)
4x32+4x32 kB
128+128 kB
Cache L2
4x256 kB
4096 kB
Cache L3
6144 kB
0 kB
Date
September 2009
April 2009
Mean monothread perf.
13.13k points
14.04k points
Mean multithread perf.
38.78k points
51.92k 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
Q8400
Test#1 (Integers)
1.49k
2.44k (x1.64)
Test#2 (FP)
3.4k
6.24k (x1.83)
Test#3 (Generic, ZIP)
1.95k
2.62k (x1.34)
Test#1 (Memory)
2.08k
1.43k (x0.69)
TOTAL
8.92k
12.73k (x1.43)
Multithread
i7-720QM
Q8400
Test#1 (Integers)
4.23k
9.71k (x2.3)
Test#2 (FP)
11.4k
24.81k (x2.18)
Test#3 (Generic, ZIP)
7.17k
10.51k (x1.46)
Test#1 (Memory)
4.51k
2.03k (x0.45)
TOTAL
27.32k
47.05k (x1.72)
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
Q8400
Test#1 (Integers)
5.49k
3.08k (x0.56)
Test#2 (FP)
3.55k
6.8k (x1.92)
Test#3 (Generic, ZIP)
2.01k
2.73k (x1.36)
Test#1 (Memory)
2.09k
1.42k (x0.68)
TOTAL
13.13k
14.04k (x1.07)
Multithread
i7-720QM
Q8400
Test#1 (Integers)
15.06k
12.25k (x0.81)
Test#2 (FP)
12.15k
26.84k (x2.21)
Test#3 (Generic, ZIP)
7.18k
10.82k (x1.51)
Test#1 (Memory)
4.39k
2.02k (x0.46)
TOTAL
38.78k
51.92k (x1.34)
Performance/W
i7-720QM
Q8400
Test#1 (Integers)
335 points/W
129 points/W
Test#2 (FP)
270 points/W
283 points/W
Test#3 (Generic, ZIP)
160 points/W
114 points/W
Test#1 (Memory)
98 points/W
21 points/W
TOTAL
862 points/W
547 points/W
Performance/GHz
i7-720QM
Q8400
Test#1 (Integers)
1962 points/GHz
1157 points/GHz
Test#2 (FP)
1267 points/GHz
2551 points/GHz
Test#3 (Generic, ZIP)
717 points/GHz
1025 points/GHz
Test#1 (Memory)
745 points/GHz
532 points/GHz
TOTAL
4691 points/GHz
5265 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