After researching all evening I've come to the conclusion a Radeon HD7770 is best for my needs, but I'm not sure which of these two brands I should go for:
I currently spent 100% of my time using Ubuntu, but being tempted back to dabble in my Windows partition by the thought of playing DayZ & perhaps some others, thus I need a basic graphics card!
Athlon II X2 245 CPU
2x 2gigs DDR3 RAM
Thanks in advance! :)