for work I need to get a a new and cheap graphics card for a dual boot machine: windows xp/ubuntu 12.04 LTS.

The only requirements I have are:

• it should work 'flawlessly' in ubuntu (proprietary drivers are ok)
• it should handle Guild Wars 2 & League of Legends in windows xp (this is really the top priority as we need to be able to play at work :) - yes I have a cool job)

I know nothing about graphics cards (and it seems to be a jungle out there).

From other questions here and some webstigation I think I'd like to go for a Nvidia card, I've been trying to figure out what models fit the system req's but it seems they use different kind of model numbers so I don't get any wiser.

tl;dr: will http://www.geforce.co.uk/hardware/desktop-gpus/geforce-gt-620-oem/specifications run Guild Wars 2 http://gamesystemrequirements.com/games.php?id=938

Or what is the worst card from nVidia that will run GW2 smoothly and work well in Ubuntu 12.04

Thanks!