Read all the sticky threads before asking any type of query. Most basic questions are answered in those.
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Rather than a new gfx card, do yourself a favor and get some RAM sticks. 256MB doesn't even run a current OS properly (Ubuntu Intrepid, Vista etc.), let alone a proper game.
I guess NFS Porsche should run at native resolution. Sorry I can't think of anything else.
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•Favorite track Of '07: Dash Berlin - Till The Sky Falls Down
•Favorite track Of '08: Emilio Fernandez - Reynosa
•Current favorite track: Blackfeel Wite - On The Down (J-Soul Vocal Mix)
hehe...me too dont have any graphics cards on my PC ...recently upgraded my ram to 2.5 gb and i'm running PES 09 [which asks for some pixel shader stuff..but i conveniently ignore it ]
try Urban Terror. your intel on-board graphics should be able to play the game in Windows easily if u increase your RAM. Otherwise, u will have to end many processes and lower the settings.
I can offer solution like go for games of MMPORG type your will get most of the games there that can be played without requiring much of Graphics and these games are successful too for example Maple Story, Wolfstein Ememy Territory etc.