Hello guys,it's since a while that i have in plan to upgrade the components of my pc and for xmass i have 230$ for upgrading my hw.
Obviously to not go in a cpu limited state the upgrade could not be so significant but it still have a sense to me because right now games on my pc runs very bad to the point that even WoW lag.
I would suggest not going with GTX 650. It's severely underpowered and overpriced. Go with GTX 650 Ti instead; it's just a bit more expensive but much more powerful.
By alimentator I suppose your mean the power supply unit ? If you buy a new one, make sure to stick with one of the quality brands, that is Antec, Corsair, FSP, Seasonic and XFX. Stay away away from brands like Cooler Master, their power supply units aren't worth a penny.