I need to upgrade my currently stock PC , i feel like 300 is reasonable amount for card and PSU, want to be able to run some new games on high detail level. Currently i have http://h10025.www1.hp.com/ewfrf/wc/document?cc=us&lc=en&docname=c03632874#N432 with HD7660D shared built in card. Thank you for your help 