HardOCP checked out the NVIDIA GeForce GTX 970 SLI 4K and NV Surround
A quote from the article:
We have just posted our NVIDIA GeForce GTX 970 SLI 4K and NV Surround review this afternoon. If you haven't had the opportunity to read it yet, make sure you take the time to do so, you won't be disappointed.NVIDIA GeForce GTX 970 SLI 4K and NV Surround Review @ HardOCP
We take 2-Way NVIDIA GeForce GTX 970 SLI for a spin and compare it to R9 290X CF, R9 290 CF, GTX 780 SLI at 4K resolution as well as NV Surround on a triple-display setup. If you want to see how all these video cards compare in these different display configurations we've got just the thing. Find out what $700 SLI gets you.