Since certain people want to be pissy about this I'm asking this question that ANOTHER person has already asked. I want to be able to play The Sims 3 in addition to it's expansion packs on high setting (the non-online game).
I know I will have to pay for another psu and a card so here are my thoughts, I know I need help in choosing a psu and this following link is the specs for this tower HP p6813w. Mind you I am not computer smart but I know little tid bits. I'm clueless as far as picking a psu to power a decent card. my limit is around $100.
I have the same computer and found many PSU wont work with this computer.
It needs a 4 wire plug to the motherboard that many PSUs don't have.
They have a 4 wire plug with the 20 wire plug, but it won't work on my computer.
I got a Thermaltake TR2 600 W and it works very well.
It powers the big bad graphics card I just put in.
My new graphics card is a Radeon HD 6770.
It is working great and video game frame rates are much faster.
Even playing on a 46 inch HDTV at 1900 x 1080 res.
It looks amazing.
I am sure this PSU will handle many different graphic cards.