Indeed, a new graphic card (we recommend the lists on tomshardware.com to find one you like) is needed, but this also needs a new power supply.
My brother's PC is on the old and slow side. Can play most recent games (for certain values of "playable") but want to upgrade it so we can play together without him having to run everything on minimum. Wondering what would give the best bang for buck.
Dell Optiplex 745
3.2 GHz Pentium D dual core
ATI HD 5450 1GB
4GB DDR3 RAM
280W power supply
Any upgrades would have to be within the current case, I can swap out the odd component but not really up to building a computer from scratch :/
CPU and RAM are probably okay, not many games uses more than 2 cores and 4GB, so I'm thinking the way to go would a new graphics card.