I searched the forums and the only posts involved the AMD card and I have an Nvidia card. I couldn't find any information on the K4000M so I called tech support and they told me it was 2560x1600. But then I found another forum where they said even the K1000M can do 4k.
I hooked up my 4k TV to the HDMI and used the Nvidia custom resolution to set up 3840x2160 at 30 hz and the display works. The graphics look great, but the text is super fuzzy. The TV supports 4K at 60Hz, but I'm not sure if the HDMI port on the back of my M6700 supports 60Hz.
Does the HDMI support 60Hz at 4k? What about the display port? Any idea why my text is super fuzzy while the graphics are razor sharp?
First, I'm going to refer you to this article from Nvidia discussing Ultra 4k Resolution. The important statement is this:
The current HDMI 1.4 standard only has bandwidth for 4K at 30hz. HDMI 2.0 will add support for 4K at 60Hz. Details should become clearer in late 2013. There are a few TVs on sale today that support 4K @ 30Hz through HDMI.
Now, according to this review and article about the K4000m card specifications, it states that the card has HDMI 1.4 connections, which means it won't, theoretically, handle Ultra 4k resolution at the 60Hz bandwidth.
I also found this on documentation online about the Precision 6700.
The Precision™ M4700 & M6700 incorporates HDMI version 1.4. Features
So, unfortunately, it doesn't sound like that card will support the higher refresh rate needed.
As for Display port
DisplayPort cables are much simpler to define: There’s just one type! The current version, DisplayPort 1.2, delivers enough bandwidth to carry video resolutions of up to 3840 by 2160 pixels at a refresh rate of 60Hz
So Display Port would be a much better option for you, if available.
I hope this answers your questions.
I will add some question.
I am using a precision 6600m with an Nvidia Quadro 4000m.
Monitor is Benq bl3201ph 4k.
I am using the Display Port - Mini Display Port cable given from the factory that is supposed to work at 4k 60Hz 10 or 12 bps colours (100% sRGB spectrum)
But I am not able to go over 4k 30 Hz at 8bps colour with the Display port.
The HDMI instead it work at full hd at 12Bps colour. (not over full hd)
With bot cable I can use some other resolution but they don't give an optimal choice.
Tomorrow I will try to buy a new Display Port cable even if I don't think it will resolve anything.
If somebody have a solution to use my workstation at 4k 60Hz 10 or 12 bps colours it will be more than welcome, because after try the new cable I will give up and send the monitor back (that Is a big lost, the monitor it seriously improve my workflow)