Upgrade your CPU to like a Core 2 Quad, so that you don't have to upgrade the whole PC. And then get a GTX 750.
And yes, GTX 780 would work with C2D, but a huge bottleneck.
Upgrade your CPU to like a Core 2 Quad, so that you don't have to upgrade the whole PC. And then get a GTX 750.
And yes, GTX 780 would work with C2D, but a huge bottleneck.