FUD Zilla heard the upcoming Intel Core i7 640UM will have a 18W TDP. This is an ultra low voltage dual-core chip with integrated graphics, it is expected to be launched in Q1 2010.
Many will be confused by the fact that Core i7 640UM has 80 percent higher thermal design power, or 18W compared to 10W to SU9600, but you have to
remember that the Core i7 640UM, also known as Arrandale also has an IGP inside that is contained within this TDP.
The TDP more or less stays at a similar level but the frequency of Core i7 640M is at disappointing 1.2GHz, compared to the 1.6GHz with SU9600. Again there is catch as Core i7 with its turbo mode can overclock all the way to 2.26GHz with probably much higher TDP, but this mode probably won’t activate until you plug your notebook in, or set it to run at full performance.