Procesador: Core I5 4460
Grafica que quiero comprar: GTX 960 4 Gigabites de memoria dedicada al video.
It will be "compatible" with your CPU. Whether it will be compatible with your motherboard is another question. You need to ask the motherboard manufacturer if THEIR motherboard will support the graphics card.
Now, a different perspective. Your processor is from 2014. It is a good processor. But, times change, and requirements change. Are you certain you want to make such an investment on this OLD motherboard and processor?
It might be worth considering a new system.