Displayport 1.3 which supports 5k 60fps became widely available with the NVIDIA 900 series just 5 months after the 5K iMac released. AMD followed suit 1 year after.
They could have very soon added support for it, maybe even launched with DP 1.3 support if they worked something out with AMD.
They could have very soon added support for it, maybe even launched with DP 1.3 support if they worked something out with AMD.