Is 2gb enough for 770 SLI?

[JVictorSR]

Is 2gb enough for 770 SLI. Some games use 1 gb of 2 gb of vram on a single card. Would SLI use more vram than the single card because it is faster?

 

[PyjamasCat]

2GB is not really optimal if you want lots of eyecandy and AA and even less so at high resolutions. (Above 1080p). I think BF4 wants 3GB of VRAM when on high details, so future games are likely to follow. I don't know what you mean by "does SLI use more VRAM" but VRAM won't stack, as you may have already known and SLI should use the same amount of VRAM as the data is mirrored across all GPU.

EDIT: You will probably want 4GB cards if you want them to last longer.

 

[jaguarskx]

Depends on the resolution.

Right now, I think most people will say that although 1GB is adequate for up to 1920x1200 resolution, 2GB of VRAM is preferred. For 2560x1440 to 2560x1600, 2GB is adequate, but at least 3GB is preferred. For a triple monitor setup with 5760x1080 resolution you will want 4GB.

Having beyond 4GB of VRAM on a single graphics card for 5760x1080 seems to be a waste of money the last time I looked at benchmark results between SLI'ed GTX 690 w/ 4GB and SLI'ed GTX 690 w/ 6GB. I was helping out someone in the UK over the summer who was asking if the extra $150 (USD) for each GTX 690 (a total of $300 USD), was worth the money. The benchmark results I've found was that at best the increase in performance was 3 FPS, but most times there was only 1 FPS or 0 FPS gain. The overall average increase in performance for all games benchmarked was almost 1 FPS.

It was either a GTX 690 or Titan. Can't remember now.

 

[acid1drinker]

Better get more Vram today rather than regretting after a year
Technology changes very fast, no one can predict that 2gb will be adequacy of insufficient or more than enough even for 1080p gaming 1 year down the line