Termie
Diamond Member
OP - while there is a very vocal critic of SLI in this thread that has never used it (and instead upgraded his 780 to a 980), there are a lot of others here who would suggest that 780 SLI is a much better upgrade option - definitely more cost-effective.
Also, why consider the red herrings of UE4/Id? UE4 isn't even used in any mainstream games yet. It's basically a tech demo. SLI will surely be added when it's worth Nvidia's time. And idTech games? That's all of two games right now.
That being said, I need to caution you about going SLI for a 1080p/120Hz monitor. Having tested 780 Ti SLI extensively, I can tell you that most games don't hit anywhere near 80% scaling (which is the ideal for SLI) when running at 1080p. The graphics load just isn't high enough even maxed out, and you start to hit the CPU too hard to let it catch up. And this is with a 4770K@4.5.
Now it's when you start to scale up resolutions, rather than refresh rates, where SLI comes into its own. Current games just aren't strenuous enough at 1080p for SLI to work exactly how you'd want it to for a high refresh rate monitor.
Also, why consider the red herrings of UE4/Id? UE4 isn't even used in any mainstream games yet. It's basically a tech demo. SLI will surely be added when it's worth Nvidia's time. And idTech games? That's all of two games right now.
That being said, I need to caution you about going SLI for a 1080p/120Hz monitor. Having tested 780 Ti SLI extensively, I can tell you that most games don't hit anywhere near 80% scaling (which is the ideal for SLI) when running at 1080p. The graphics load just isn't high enough even maxed out, and you start to hit the CPU too hard to let it catch up. And this is with a 4770K@4.5.
Now it's when you start to scale up resolutions, rather than refresh rates, where SLI comes into its own. Current games just aren't strenuous enough at 1080p for SLI to work exactly how you'd want it to for a high refresh rate monitor.