Anyone with experience with a 4k g sync monitor care to share what GPUs they have and how the experience is?
I suggest a plug, AC 110/230V depending on where you are in the world.
No experience with it but the current state is not good.
To push a game at 2K and take advantage of G-Sync you will be looking at dual 980's minimum for AAA. And that will only be feasible on game that will use SLI. For games without SLi you are in for frame drops and lowered settings. For older games, go for it it will be fine as long as they support 2K resolutions.
Basically many game don't, at the moment, support 2K resolutions and those that do are usually AAA/Console ports and run bad in general.
What you could look at doing is to get the monitor now and then look into gpus in a few years once 4k becomes more feasible. In the meantime, you would have the advantage of 4k while not in game, and perfect scaling for 1080p gaming while in game. Whether or not G-sync (or free-sync for that matter) works with scaling like that, I don't know, but I would assume that you would be able to set the in-game resolution to 1080p and have no issues with functionality at all. Regardless, I would suggest looking to free-sync instead as I am fundamentally against proprietary standards as nVidia implements. They are the Apple of the computer hardware world.