Intel® Core™ Duo processor T2250
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Intel® Core™ 2 Duo processor T5200
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eller denne meget udførlige guide med en masse test resultater osv.Ultimately, we have to conclude that the performance delta between Core Duo and Core 2 Duo is relatively small in most cases, but there are noticeable differences when running CPU-intensive applications. When using your laptop for simple everyday tasks like writing Word documents you'll notice zero advantage with a Core 2 Duo. However, the new CPUs come into their own when performing more demanding tasks such as 3D rendering. Here it outperforms its predecessor by a notable, if hardly mind-blowing margin.
General application performance can improve a bit by switching to Core 2 Duo, but the biggest performance gains are associated with 3D rendering and media encoding tasks. Considering the nature of the improvements to Intel's Core 2 processor, the areas in which it succeeds are not surprising. If you use your notebook as a professional rendering or encoding workstation with no desktop in sight, then you'll probably consider Core 2 Duo a lot more carefully than most.

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.

