Hi there im new with have to upgrade a computer and really have no clue what to go with. I have read some stuff about replacing the graphics card and it seems like all answers point to replacing my power supply also. I am on a pretty tight budget $150 or less. I have an HP p6120f it has direct x 11 and has a pci express X16 express slot but only has a 250w power supply. I read in a forum that recomended the xfx- HD465xzDF2 but as i was looking and minimum requirements it said 400w power supply will this work? and if not does anybody have a suggestion on what would work at least for the time being. My current graphics card doesnt support transform and lighting and that is what my true problem is. couldnt get on fall out new vegas and also wow is starting to give me the black screen freeze. also operating system is vista home premium and the processor is pentium (R) dual core E6300@2.50ghz (2 cpu) with 8gb RAM. i dont know if this will be enough information to work with but i would appriciate the help thanks>