Is it possible to upgrade the processor in an Inspiron 3558-1511 from i3 to i5? I did this successfully on my 3520, but i know shortly after that model the processors were soldered to the board. Thank you.
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This model has a soldered on CPU - to upgrade, the mainboard must be replaced - the CPU alone cannot be upgraded.
The board with an i5 runs about $200 -- add another $100 in labor if you don't change it yourself. Either price may give you pause -- and make it a better idea to invest the $200-300 in a newer system, since this one probably didn't cost a lot more than $300-350 when it was brand new.