I wouldn't get a 4GB GTX680 unless your running a 1440p monitor or higher. If not then you get basically no benefits. And you will actually have more negatives out of it then you might think because of the memory latencies.
Motocross is not just a sport, it's a lifestyle.
File Server: Intel Pentium G630, 8GB PNY 1600, AsRock H77M Micro, Corsair CX430M, Vertex 2 90GB (OS), 2x WD Red 2TB in RAID1
“We will never know our full potential, unless we push ourselves to find it. -Travis Rice”