deadnose :
Hi all I've got a Lenovo Z580 with a Pentium B970 , 6GB DDR3 and a nVidia GT640M . I want to upgrade the cpu to an i7 2620M . I saw that both CPUs were socket G2 (rPGA988B) so could I replace the pentium or the computer won't handle it?
I say the same thing every time,
I'll come out and say that changing your laptop CPU honestly isn't worth it.
I'd instead recommend you upgrade to an SSD, as that actually improves performance which you can notice on a day to day basis, which you can carry onto other systems as well.
If you happen to move your laptop all the time, and need durability I'd than recommend an Intel SSD, as they have a great reputation of reliability. If your looking for value, look into Crucial or Samsung SSDs. Plextor and ADATA also make good SSDs.
I'd also recommend upgrading to Windows 7 or 8 if you plan on upgrading to an SSD.
Let me know if you would like some help.