Its called Central Processing Unit(CPU) Not GPU lol I wouldn't suggest anyone who doesn't know about computers to work on them
Pro's: You might have a .3% faster computer
Con's: You might been the pins in the cpu and have to buy another CPU or computer when you could of just bought a new computer in the first place
Might not even be compatible (yes it HAS to be compatible)
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You pick
but yes for CPU's the higher the faster