halflife 2. fear combat evolved, in fact any dx9 game you choose up to crysis.
your gonna run in to problems with any game that requires an 88gt or above for minimum recommended gfx. so witcher 2 deus ex 3 bfbc2 will likely be unplayable at anything over minimum settings.
the 1950 pro can be compared to a 96gt for dx9 games but any game that had a dx10 requirement to play will not work. so games that are run on the frostbite 2 engine wont work at all unless you switch up to win 7 and even then your gonna struggle to get minimum frame-rates...
back in the day the 1950 pro was a beast but today it barely passes muster on new games. so if you can upgrade to a gtx 260 or better, if your pc's psu can handle it...
as you have a dual core its likely to be on a 775 socket. if so, you could look to upgrade the cpu also. a minimum of a 2.4ghz quad core, that, with say a gtx 460/hd 6850 will allow you to play any new game at better than minimum settings...
the out lay for such an upgrade?. between 270 and 350 pounds depending on whether you need a new psu or not.
with the amd gpu its unlikely you would need to upgrade the psu but anything over a gtx 260 from nvidia will likely require a new 1..