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Core i7-720QM vs Core 2 Duo T6400


Description
The i7-720QM is based on Nehalem architecture while the T6400 is based on Core.

Using the multithread performance as a reference, the i7-720QM gets a score of 38.8 k points while the T6400 gets 17.1 k points.

Summarizing, the i7-720QM is 2.3 times faster than the T6400. To get a proper comparison between both models, take a look to the data shown below.

Specs
CPUID
106e5
1067a
Core
Clarksfield
Penryn-3M
Architecture
Base frecuency
1.6 GHz
2 GHz
Boost frecuency
2.8 GHz
2 GHz
Socket
988-pin micro-FCPGA8
FC-PGA
Cores/Threads
4/8
2/2
TDP
45 W
35 W
Cache L1 (d+i)
4x32+4x32 kB
2x32+2x32 kB
Cache L2
4x256 kB
2048 kB
Cache L3
6144 kB
0 kB
Date
September 2009
January 2009
Mean monothread perf.
13.13k points
10.08k points
Mean multithread perf.
38.78k points
17.08k 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
T6400
Test#1 (Integers)
1.49k
1.76k (x1.18)
Test#2 (FP)
3.4k
4.63k (x1.36)
Test#3 (Generic, ZIP)
1.95k
1.86k (x0.95)
Test#1 (Memory)
2.08k
1k (x0.48)
TOTAL
8.92k
9.24k (x1.04)

Multithread

i7-720QM

T6400
Test#1 (Integers)
4.23k
3.21k (x0.76)
Test#2 (FP)
11.4k
8.75k (x0.77)
Test#3 (Generic, ZIP)
7.17k
3.47k (x0.48)
Test#1 (Memory)
4.51k
1.14k (x0.25)
TOTAL
27.32k
16.58k (x0.61)

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
T6400
Test#1 (Integers)
5.49k
2.26k (x0.41)
Test#2 (FP)
3.55k
4.98k (x1.4)
Test#3 (Generic, ZIP)
2.01k
1.89k (x0.94)
Test#1 (Memory)
2.09k
0.96k (x0.46)
TOTAL
13.13k
10.08k (x0.77)

Multithread

i7-720QM

T6400
Test#1 (Integers)
15.06k
4.06k (x0.27)
Test#2 (FP)
12.15k
8.53k (x0.7)
Test#3 (Generic, ZIP)
7.18k
3.38k (x0.47)
Test#1 (Memory)
4.39k
1.11k (x0.25)
TOTAL
38.78k
17.08k (x0.44)

Performance/W
i7-720QM
T6400
Test#1 (Integers)
335 points/W
116 points/W
Test#2 (FP)
270 points/W
244 points/W
Test#3 (Generic, ZIP)
160 points/W
96 points/W
Test#1 (Memory)
98 points/W
32 points/W
TOTAL
862 points/W
488 points/W

Performance/GHz
i7-720QM
T6400
Test#1 (Integers)
1962 points/GHz
1128 points/GHz
Test#2 (FP)
1267 points/GHz
2491 points/GHz
Test#3 (Generic, ZIP)
717 points/GHz
944 points/GHz
Test#1 (Memory)
745 points/GHz
478 points/GHz
TOTAL
4691 points/GHz
5040 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.


Test#1 (Integers) [points vs time]

grafica bm.hardlimit.com


Test#2 (FP) [points vs time]

grafica bm.hardlimit.com


Test#3 (Generic, ZIP) [points vs time]

grafica bm.hardlimit.com


Test#1 (Memory) [points vs time]

grafica bm.hardlimit.com

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.


Test#1 (Integers) [points vs time]

grafica bm.hardlimit.com


Test#2 (FP) [points vs time]

grafica bm.hardlimit.com


Test#3 (Generic, ZIP) [points vs time]

grafica bm.hardlimit.com


Test#1 (Memory) [points vs time]

grafica bm.hardlimit.com

Hardlimit Benchmark Central - Ver. 3.11.4