Its funny how nobody can provide actual benches comparing performance of the
same card vs a higher vram version of same card at 1440p/1600 res (ie, 770 2gb vs 4gb, 780 3gb vs 6gb, etc). You cant cross-compare different architectures (ie 770 vs 280x, etc) and attribute performance difference solely due to vram. Also not accurate to use gk104 vs gk110 (770 vs 780) to look at performance delta of different resolutions and say vram is a big factor. I've only seen one set of benches where 2 vs 4gb does indeed make a difference..... but at 7860x1600:
http://www.legionhardware.com/articles_pages/gigabyte_geforce_gtx_680_4gb,4.html
There may be other benches/charts that show otherwise (@2560x1440/1600), just havent seen any. Actual vram usage charts are useless as they dont show performance impact nor how/if the vram is actually being used or just cached. Unless someone can actually prove 2 vs 3 vs 4 vs 6gb performs better at 1440/1600 (with published data) , then all talk in this regard is pure conjecture.
This. The talk of 3GB being needed for 1440p, frankly, cracks me up because i'm fairly sure I gamed extensively with 680s at 1600p for what seemed like ages. 2GB was fine. And is fine because the next generation consoles are a joke in terms of power.
Last I checked, the 770 was available with 4GB anyway. And the card linked by OP was 380$? Seems to me you can get a 4GB 770 for that price can't you?
There are tons of websites that have done 2 vs 4 GB benchmarks in tons of games even in surround. HardOCP. Legitreviews. I could bother to link these reviews of 2 vs 4GB if I wanted to waste time, but then an entire thread page would be filled with cries of foul. Biased website. Blah blah blah. In fact, HardOCP benched 2 vs 4GB at 5760x1080. Performance difference? Take a guess. ZERO. Same stuff as always. Anyway, of all of these reviews of 2 vs 4 GB cardS? Performance difference? Absolutely
none. Now some AMD resellers may try to sell you on the AMD card, but really, you don't need more than 2GB. The only cases in which more than 2GB makes sense is if you're using heavy surround resolutions or using tons of SSAA. Of course if you're using tons of mods and tons of SSAA you'll run out of GPU horsepower before VRAM is even an issue.
More VRAM is not about performance. It is about more anti aliasing. More SSAA. We're in a situation where the next generation consoles are so pathetic, that AA is using more VRAM than actual game assets are. Is that sad? Yes, yes it is. What more VRAM is good for is: More modding. More SSAA. Now once you get into 4k, more VRAM makes sense. Surround 1440p times 3? Yes, get 4 or 6GB. And you have that option of getting 4GB with the 770 or 6GB with the 780s. Or you can do the AMD thing. But you don't need more than 2GB for 1440p unless you want to go crazy with SSAA or modding, period.
Then AGAIN, by the flip side of the coin, the 280X you linked is the same price as a 4GB 770 anyway. Just buy what you want to buy, I would suggest ignoring the questionable advice from some folks (with questionable intent at that) and hit up google. Don't listen to me or anyone else that will try to muddy the waters. Go to google. Google 2 vs 4GB 680 benchmarks. Google reviews of the 770 and 280X. Use your brain for yourself. I'm confident that once you eliminate the forum noise, you can make a good buying decision - both cards are good performers, but the VRAM really is a non issue; I say this after having gamed extensively at 1600p. You should be thinking more along the lines of software and features for your purchase. Like I said. Eliminate the forum noise and find these reviews through google. Find reputable review websites. There you will find more info than you could ask for without forum noise.