you had 765mb models? I have 1gb so x2 is the same VRAM as 680....or 670
No, and no. The 460s were 1GB and the total VRAM is not cumulative over multiple cards. If you had triple SLI with 1GB it doesn't mean you have 3GB, it means you have 1GB, but multiple rendering units. AA is a frame rate killer because you're basically rendering things twice and blending it down and with the hi-rez textures and bump maps and whatnot, VRAM is critical. GTA IV can tell you how much VRAM your texture and draw distance settings are using and I was able to crank those up with the 2GB card. (It's why there are some deluxe cards with 3GB VRAM.)
Whether something is "worth it" is a subjective matter. I'm not trying to convince you that it was a good deal for me or that you're missing out because you're standing pat. If you're happy with your setup, I'm ecstatic for you. I ran SLIed 8800GTs for almost three years before doing a couple of years with the 460s. I used to upgrade EVERY cycle from the original TNT through the 8000-series, but skipped the 9000 and GTX 2xx rounds. Only hopped up to Fermi with the 460 and then Kepler with the 660. If there's a need for an 870 in a couple of years, we'll see. There are so few games which really tax hardware more powerful than an Xbox 360 I can't understand why SLId 680s would be needed other than triple-screen l337s or ePeen kids.
Did I
NEED to upgrade my setup? Not really and I had been planning to wait for the next revision of Kepler supposedly coming this fall, but when they unveiled the 670, I looked at the reviews, looked at the price ($420) and was having a bad day at work, so I decided to do some "retail therapy" and treated myself to the upgrade. I really need to list the old cards so I can recoup a bit of money on the deal.
Cheers.
