Hi I was going to buy a 770 gigabyte 4gb few days ago but it was out of stock.Now after looking around I'm thinking to go for the 780 gigabyte 3gb. i play at 1080p and i don't overclock. The important thing is to future proof my gaming pc as much as I can.at the moment i have a 460 1gb palit and is showing it's age in some game, my 460 lasted nearly 3 years so by getting a 770 or 780 i should be able to pull 4 years .i Know that the 780 is more powerful but is has 1 gb less and is 80 pound more expensive so I'm not sure is worth, also I'm not sure my current power supply can run the 780, the model is fsp600-80enp and is 600w 80 plus.
pc spec
I7 2600
4gb samsung 1333mhz
asus sabethooth z(something)
pc spec
I7 2600
4gb samsung 1333mhz
asus sabethooth z(something)