Can I daisy chain 3 Dell U2415 monitors with my existing sapphire radeon hd 6850 (100315L)? Dell gives me a warning: "Please ensure your Graphics Card can support DP MST (Daisy Chain)/HBR2 (High Bit Rate) before changing the monitor setting to DP1.2. Incorrect setting may result in blank screen on monitor." The Specs for my GPU that it is DP MST but only say HBR2 Audio, so I am nervous. Can I daisy chain these monitors?