Q: I haven't bought the machine yet, but i'm thinking ahead to see if it will be worthwhile.
A: This is a web page that will calculate what power you need from your PSU. you need to know a lot about what you are putting into the computer to fill this out. http://web.aanet.com.au/SnooP/psucalc.php You may not need a new PSU it depends what it comes with. Also if you have a good PC knowledge I would suggest building you own PC. Its a good experience!