will this spec work???

[asdfghjkl123]

I will buy i5-4440 3.1GHz, AMD 7870 and my ram is 6GB (4+2).
so can i run these games: ACU,GTA5,FC4,Watch Dogs..i dont want in high or ultra settings, i just want to run it on medium settings with no lag my screen resolution is 1366*768....so can i....and how much watt is required for this graphics card?

please reply...thanx in advance

 

[qubits]

i would say not a problem at 768p but i see some ubisoft games up there and there has been problems with them and amd gpu's