my computer is a Dell inspiron 570 but i want to be able to game on it and i know i need to upgrade my psu to get a good card but could someoen help me with everything i need to upgrade the only thing changed is i have 6 gigs of ram instead of 4.
Some other notes, looks like only the side panel has thumb screws so depending on the mounting system for the psu (couldn't find any images with the side panel off) you may need to pull out the trusty drill to get it out, bloody rivets. Also consider the fact that case has piss poor airflow and the cpu is weak as hell for gaming.
My honest opinion is if you looking at putting anything more than a 7750 in it just build a new rig, even with stock hardware people have had the cooling fans spin up from what I have read thus far, I would hate to see what it would do with a gpu throwing some heat out.