I have a mid-2008 workstation with two HD monitors supporting HDMI and DVI inputs. Since Ubuntu 11.10, I have experienced no end of trouble with my NVidia Quadro NVS 290 in TwinView dual-monitor output. Others have similar desktop TwinView woes. I want a new graphics card.

Previously I asked for a graphics card recommendation and response was Nvidia Geforce GTS 450... but really I'm looking for someone who has actually got a working dual-monitor desktop to tell me what card they use so I can get something that is known to work.

So please, people who have no-issues with their 64-bit Ubuntu 12.04 Unity 3D desktop spread across two HD-resolution external monitors (either DVI or HDMI connector), and who also run Google Chrome (which throws a spanner due to its own GPU compositing)... please let me know what graphics card you have so I can buy one.

Gathering Options

These seem to be the Nvidia cards featuring dual DVI. But they all seem to be gaming cards - what has dual-DVI, good support, but is not a massive gaming card?

• Nvidia GTS 450 (previously recommended) - 2x DVI
• Nvidia GTX 550 Ti (used by System76) - 2x DVI
• Nvidia GT 430 (used by System76) - 1xDVI, 1xHDMI
• Nvidia GT 640 (found on NVidia site) - 1xDVI, 1xHDMI (also GT 620, GT 630)

Has anyone had a good desktop dual-monitor Unity 3D experience with ATI cards?