Mac Pro 5,1 Stock Radeon HD 5770 Dell 27" Ultrasharp 1440p Monitor Trying to get boot screen AND 1440p resolution. Figured out I can only get boot screen by going into monitors HDMI port, not DP ports. So I have 3 ways of doing that on hand now... A cheap Mini DP to HDMI adapter - Boot screen but locked at 1080p An expensive 4k 60hz Mini DP to HDMI adapter - No boot screen but gives 1440p A 4k 30hz Mini DP to HDMI cable - No boot screen and locked at 1080p Right now I have both the adapter plugged in to the 2 Mini DP ports and just switch the HDMI cable when needed, but it'd be nice to figure out why 2 of these solutions wont let me get 1440p res. A google search turned up several solutions that I tried. Hopefully someone here has an idea. Thanks!