Laptop 4th gen cpu compatibility problem

[panoszikos]

Hello, I have a laptop with a w54_w550su2 motherboard and I want to upgrade the cpu but I can not find any info abou the socket of this motherboard and the compatibility list of cpu’s. The laptop have an i3 4005u cpu

 

[bignastyid]

The CPU is BGA, which means it's soldered to the motherboard and not upgradable.