Can you replace a intel celeron with a intel pentium 4 processor 640?

Nope. That's my first inclination, especially without information like model number and such. Additionally the Pentium 4M is what you need for a laptop, you cannot use a desktop CPU.

my computer specs is

Compaq Presario CQ62

CPU: Intel Celeron 900 @ 2.2 Ghz

RAM: 3 GB

 

The good new is that the laptop has a modular socket, rather than soldered chip.

The bad news is that you are limited to Pentium 4-M processors, and even then you run the risk of overwhelming the laptops cooling system because it was not designed for any other processor.

Possible choices:


Intel Mobile Pentium 4-M 1.5 GHz (RH80532GC021512) 1.5 GHz 512 KB 26.9 Watt SS
Intel Mobile Pentium 4-M 1.6 GHz (RH80532GC025512) 1.6 GHz 512 KB 30 Watt SS
Intel Mobile Pentium 4-M 1.6 GHz (RH80532LC025512) 1.6 GHz 512 KB SS
Intel Mobile Pentium 4-M 1.7 GHz (RH80532GC029512) 1.7 GHz 512 KB 30 Watt SS
Intel Mobile Pentium 4-M 1.8 GHz (RH80532GC033512) 1.8 GHz 512 KB 30 Watt SS
Intel Mobile Pentium 4-M 1.9 GHz (RH80532GC037512) 1.9 GHz 512 KB 32 Watt SS
Intel Mobile Pentium 4-M 2 GHz (RH80532GC041512) 2 GHz 512 KB 32 Watt SS
Intel Mobile Pentium 4-M 2.2 GHz (RH80532GC049512) 2.2 GHz 512 KB 35 Watt SS
Intel Mobile Pentium 4-M 2.4 GHz (RH80532GC056512) 2.4 GHz 512 KB 35 Watt SS
Intel Mobile Pentium 4-M 2.5 GHz (RH80532GC060512) 2.5 GHz 512 KB 35 Watt SS

So in that case, is it possible then? Putting a Intel Pentium 4 640 @ 3.2 GHz processor on my laptop?

No, because the 640 is a desktop processor. The only possible processors you can use are on that list I posted.

Ohhh ok. Thanks for the help!

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