Socket P (478)

Hello, I have a Alien Ware M17x Laptop that has "Socket P (478)" according to the program CPU-Z.   My laptop has an Intel Mobile Core 2 Duo T9600 and wanted to upgrade to an even faster CPU.  Is there any more powerful CPU's that will fit my laptop?  Is the CPU installed in my laptop the fastest available? Thank you for your answers and time.

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