Hello everyone I am considering the 7970 and 680 and have a question regarding the RAM. Assuming no issues with supply and price which card would be better for a dual monitor setup at 1920 by 1080. I had planned on gaming only one monitor at once so the question becomes is the extra ram on the amd cards beneficial even though I only plan to game on one monitor or is the 2gb's offered by 680 more than enough. Once again thanks and i look forward to discussing the answers.
The GTX680 hands down.
The GTX680 can handle up to THREE monitors with a FOURTH for non-gaming.
The advantage of the HD7970 is only realized with triple-monitor support at HIGH resolution and even then you'd need a CROSSFIRE/SLI setup in most cases for playable frame rates.
The GTX680 2GB is not only FASTER for any single monitor than the HD7970 but it's 2GB is sufficient. The purpose of the 3GB of VRAM for the HD7970 is for CROSSFIRE with two or more graphics cards because VRAM is cloned, not added in Crossfire/SLI.
Both single 7970 and 680 will play 3x1920x1080 gaming fine, with similar performance, because of the VRAM difference. Seeing the 7970 dropping from $550 to $480, it maybe a good choice for you because of the $20 cheaper and always on stock, where 680 is never on stock until now.