If you're so worried about VRAM, then buy the 4GB model..
You can't really use modded games as a measuring stick though. Skyrim is also DX9, so the texture compression isn't as efficient as what can be found in DX11 games.
Yes it is, because you get added bonuses like PhysX and 3D Vision. Plus SLI is still superior to Crossfire last time I checked. And even more importantly, the 770 is
quite a bit faster than the 7970 at all resolutions.
I can play Crysis 3 at very high settings @ 1440p on my GTX 580 SLI rig, and that only has 1.5GB of VRAM. DX11 games have much better texture compression than DX9, so the textures don't take up as much space.
That said, I personally will be going for the 4GB models just to be on the safe side..
Price is the point for me. I'm not going above 420. 400 was my maximum but I'm willing to add 20 extra to it.
I'm not using modded games as a measuring stick, just trying to say that I expect games to use more VRAM in the future so is it enough?
Although SLI and Crossfire are great options to add more performance, I was simply talking single card. Physx is nice and I like the idea, but I dunno if I'll ever use it. I liek the option though which is why I wanted Nvidia. As for 3D, I'll never play or use anything 3D. Just seems too gimmicky for me.
If you play modded Bethesda games, the extra 1-2GB is very nice especially at 1440p or above. I was hitting 2.5GB with Skyrim and the game played just fine on one OCed 7970. Outside of modded games and multi-gpu, the extra vram probably isn't worth it until we know what future games will require.
This is my main worry when picking, although I'm just going to pick one in a week maybe flip a coin. Do I take the extra VRAM on a 7970, even if it's slightly slower now, maybe that VRAM will show it's worth, or do I take the GTX 770, assuming it's even at the $400 dollar price point Nvidia says it will be and not marked up to around $450, and hope that's enough for 1080p gaming for the next 2-3 years.
Finally, I know it's lame to add in, but GPU mining plays a factor for as well in deciding between these cards. If I had no intention of GPU mining (which I normally wouldn't) I'd pick the GTX 770, suck up the 2GB of ram, and replace in 2-3 years if I had to and enjoy. But the 7970 can GPU mine. If I don't recoup my whole investment who cares. Even if I make $50 dollars mining, that basically puts me at a $350 7970 vs a GTX 770 for $400. $50 dollars less, and the 7970 isn't too far behind the GTX 770 (beats it in a number of games), not to mention the Ghz edition, I still seem to come out slightly ahead on the 7970 Ghz when factoring in mining.
The games are also a neat little plus, but I think it's really hard to put a value on the games due to the fact that if you hate all the games, it means nothing to you, but if you love all the games, it's a lot of money saved and the 7970 is a no brainer.
Decisions decisions....
Edit:
So looking at other cards of the same architecture (gk104), currently it doesnt seem to make much difference at all. There are a lot of things to consider here. Its not just 2gb vs 3gb. AMD and Nvidia have completely different designs from start to finish. The memory management is totally different, worlds apart. You have a drastically different environment.
As a quick example, look back at the core2 front side bus vs the Athlon64's imc. There was no comparison, the Athlon had mega multitudes more bandwidth yet the core2 was the much more powerful system. It held its own, even to this day its capable. I know the bus and memory are two different things, but they go hand in hand on a GPU. The key is to keep the cores busy and to do that you need a system that works together.
Nvidia seems to manage very well with less than AMD right now. The gk104 works so well that adding another 2gb normally does very little. But who can say for sure what the future will hold. My opinion is that niether the 7970ghz nor the 770 will out last one another in the grand scheme. By the time one is too slow, so will the other.
Its really up to you though. And waiting gave you more options. And now you have to decide whats best for you. If your set on the ghz, i promise it will go down now that the 770 is out. It may take a minute for AMD to respond, but i am sure they will. My opinion, personally dont think the ram will make a lot of difference. We see the 770 holding its place even at the higher resolutions and settings. But its up to you
Thanks a lot. Analogy helps a lot. Ya, I think I'm going to see the price the 7970 Ghz drops to now that the GTX 770 is out. It's what is stopping me for now but I want this within the next 2 weeks. I'm still playing games from 2003-2008 right now while I wait so I'm not in a HUGE rush but I do want to fire up Bioshock Infinite, FC3, etc. soon and I need a new rig for that. The price drop plus factoring in how I can set up mining and whether I could recoup enough money ($50-100) to influence my purchasing decision is what I'm going to be the deciding factor. Currently I'm playing Dark Souls Prepare to Die (really expected more but that's a whole other story), and I'm certainly starting to feel ready to jump into 2013 graphics haha.