So I want to upgrade my Inspiron 580's. I have had it for like 3 years. It has a Nvidia 310 which sucks. Considering my 250 watt PSU I can't even have more than this. SO I'm looking to upgrade my PSU as well as my GPU. My 310 with latest drivers handles most games at low-mid resolution with acceptable FPS. Just finished play DmC at a resolution of 1024x768. But I want more so I decided to buy. I have a i3 550 3.2 Ghz which I suspect isn't too bad. I just want to upgrade the GPU and PSU.
My PC has a current native reso- of 1920 x 1080. and an Intel H57 chipset. People have suggested me the GTX 650/HD 7770 and a new 500-600- watt PSU which come in my budget. Do you guys have any other suggestion or should I go with the 7770 and the new PSU?