I have a old pentium 4 @ 3ghz . take I about 30 minute to install - connect , turn on , insert disc , install - restart - UNINSTALL you onboard\/old graphic card through device manager I have already window 7 with my onboard 129mb graphic before : graphic 1.9 gaming graphic 1 now : graphic 4.2 gaming graphic 4.5 the card do get hot but check the temperature it be most of the time between 55-58c for those with integrated card : this card will lower significantly you cpu usage . due to that my cpu temp use to be 55-59c -lrb- playing games\/installing\/hd video -rrb- but now its around 45-50 also i include some picture for those with small pc case . -lrb- it do take 2 pcus slot -rrb- will update review after i play -lrb- apparently i can run cod4 , l4d , coh tale of valor , sc2 -rrb-