minimum requirements for 4K monitors, OpenSUSE

I recently purchased an Asus PB287 4K monitor, and encountered some problems. I firstly tried it on a PC running OpenSuse 12.1 with an i5-3570 processor and ATI Radeon HD 7500 graphics via DisplayPort, and while 4K resolution was correctly established, performance was slow (e.g. moving the mouse does not lead to a smooth path on the monitor). I tried it on a newer PC that had MSI Geforce GTX 760 Twin Frozr, DisplayPort, OpenSUSE 13.1, and there was a significant improvement. But still, it was not quite the quality I wanted, e.g. dragging applications around the screen on KDE wasn’t as smooth as I expected it to be based on my experience with KDE on 1680x1050 resolution monitors.

I was just wondering, is there a way to solve this in OpenSUSE, or does this perhaps mean that I need a better graphics card?

I’d like to add two things:

Correction: my newer PC actually has an “NVIDIA Corporation GK107 [GeForce GT 630 OEM] (rev a1)” graphics card (and not the MSI Geforce GTX 760 I mentioned in my previous post)

Additional information: I just noticed that while 4K is supported by the GeForce GT 630 OEM, it only does so with a 30 Hz refresh frequency, leading to the rough UI experience. This is true for both OpenSUSE and Windows 8 (with the latest driver installed). Does anyone have recommendations for a graphics card that supports 4K resolution @60 Hz on OpenSuSE 13.1?

I have a 630 but it is considered the top card in the mid range. I assume you have deep pockets if you are playing with 4K so go for the top card

good place to see results is here
http://www.videocardbenchmark.net/

GeForce GTX 780 Ti

looks to be top dog

First make sure it is Displayport 1.2 (otherwise on 30Hz?).

Some knowledge/idea can you find here:

http://www.phoronix.com/scan.php?page=article&item=nvidia_4k_linuxgaming&num=1 It’s about 3D and games but…

Regards