Review Core Duo vs. Core 2 Duo
Ever since Intel's launch of its new CPU generation, the Core 2 processor, there has been a lively discussion about the performance of this new chip. We had the chance to compare both processors in the same notebook.
Introduction
Thanks to chiliGREEN, we had the chance to directly compare a Core Duo processor with a Core 2 Duo CPU of the same clock rate in the same notebook.
We reviewed the following two processors:
Reassembling
One can exchange both processors without big problems, because they are based on the same chipset. But one should consider that processors of a higher clock rate might lead to essentially more waste heat. Therefore, it could cause problems, if the cooling system is not designed for higher temperatures. Furthermore, a processor of higher performance will cut down the battery runtime.
The following pictures show the disassembling of the CPU. Prior to the removal of the processor, the notebook must be turned off and the battery must be removed.
After the processor has been removed, the new CPU is placed (Take care of the direction!), the heat pipe is fixed and the notebook is closed. (If the cooler is not equipped with a heat sink pad, some heat sink compound must be put on the CPU.
For further information on this topic, consult the handbook of your notebook or the manufacturer.
Performance reviews
Following are some benchmark tests of both CPUs. Note - Nothing, but the CPU had been changed in the notebook.
PCMark 2004
- Core Duo T2400: 4514 points
- Core 2 Duo T5600: 5153 points (+14.2%)
PC Mark 2005
- not possible with both configurations
3D Mark 2001
- Core Duo T2400: 4998 points
- Core 2 Duo T5600: 5226 points (+4.6%)
3D Mark 2003
- not possible with both configurations
3D Mark 2005
- Core Duo T2400: 463 points
- Core 2 Duo T5600: 461 points (-0.3%)
3D Mark 2006
- Core Duo T2400: 159 points
CPU Score : 73 points- Core 2 Duo T5600: 173 points (+8.8%)
CPU Score : 79 points (+8.2%)
Cinebench
- Core Duo T2400
Single CPU: 114.6 sec
Multi CPU: 53.9 sec- Core 2 Duo T5600
Single CPU: 84.5 sec (26.3% faster)
Multi CPU: 46.4 sec (13.9% faster)
SiSoft Sandra
- Core Duo T2400
Dhrystone: 16549 MIPS
Whetstone: 5094/6591 FPU/iSSE2 MFLOPS- Core 2 Duo T5600
Dhrystone: 22305 MIPS (+34.8%)
Whetstone: 5547/8171 FPU/iSSE2 MFLOPS (+8.9%/+24.0%)
Quake 3 Arena
- Core Duo T2400: 115.1 fps
- Core 2 Duo T5600: 118.3 fps (+2.8%)
Super Pi
Performance
There is only a small increase of performance at benchmark test which use a lot of 3D calculations, but a clear increase of performance at CPU intensive tasks. The negative result at the 3DMark 2003 test might be caused be a certain possible tolerance at the performed tests.
The results of Super Pi are of special interest. Both processors performed equally well until 16 million decimal places. Only if run at the maximum configuration of 32 decimal places, the Core 2 Duo processor clearly wins and is 23,1% faster.
In average the T5600 Core 2 Duo Prozessor was 13,2% better at the performed test.
Emissions
Surely a change of the CPU influences the emissions. As usually, we look closer at the temperature and noise emissions.
Temperature
We detected a hot spot at the bottom side, in the middle of the notebook of 44.6°C. The average temperature at the upper side was inconspicuous at 31.1°C and at the bottom side at 36.2°C.
Temperatures on the top
Ball of hand max.: 28.4 Celsius
Top max.: 34.1 Celsius
Average: 31.1 Celsius
Hotspot:
Temperatures on the bottom
Bottom max.: 44.6 Celsius
Average: 36.2 Celsius
Hotspot:
Room Temperature: 22.5 Celsius
The operation with the Core 2 Duo CPU showed a different temperature distribution at the surface of the notebook. The average temperature at the top side did not change much. On the contrary, the hot spot at the bottom side moved nearer to the air discharge opening and the average temperature increased slightly by 2°C.
Temperatures on the top
Ball of hand max.: 28.2 Celsius
Top max.: 36.7 Celsius
Average: 31.1 Celsius
Hotspot:
Temperatures on the bottom
Bottom max.: 43.3 Celsius
Average: 38.1 Celsius
Hotspot:
Room Temperature: 22.5 Celsius
Loudness
In the contrary to a slight temperature increase, the characteristics of the fans did not change. Maybe this is, because the reviewed notebook controls the fans without the need of a subtle control of the number of revolutions.
Energy demand / Battery runtime
Of course, changes of the CPUs will also result in changes of the energy demands. This aspect can be very import, if a notebook is used mainly mobile.
Regarding the energy demand we could measure a clear increase under all loads. At full load there was an increase above 50%.
Even the battery runtime clearly declined, because of the increased energy demand. In average the battery runtime declines by 10%.
Conclusion
In our review we could measure a performance increase of about 10%. But this observation depends clearly on the application used. If an application makes intensive use of the CPU, one can also observe an increase in performance of up to 25%.
Regarding the emissions caused, one can count on a slight temperature increase and depending on the kind of control of the fans also on a slight increase in noise.
The battery runtime declined, because of the higher energy demand of the Core 2 Duo CPU. In average the battery runtime decreased by 10%.
The question rises, whether it makes sense for an user to use a Core 2 Duo CPU. To insist on the new Core 2 Duo CPU is questionable as long as there are still reserve capacities.
Regarding the price, there is not much difference between the two CPUs. The price difference between the T2400 and the T5600 is about € 250.-.
If one considers the current delivery problems and the availability of the Core 2 Duo processors, the Core Duo CPU wins over the Core 2 Duo processor.
