Upgrading my PSU and GPU.

[Axle_blaze]

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. Ram is 4GB.

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? And suggest a PSU under 80$.

Plus my 580's CPU is a slim bezel model so will it fit the 7770?
Pic here -- http://2.bp.blogspot.com/_JiH-ZdsznV8/TTL-GpakLwI/AAAAAAAAAFs/okUpGcQ8lzk/s1600/dell_inspiron_580s.jpg.

Thanks in Advance.
_____________________________________________________________________
PCI
Connectors
one
Connector size
124-pin
Connector data width (maximum)
32 bit
Bus speed
33 MHz
PCI Express x1
Connectors
two
Connector size
36-pin
Connector data width (maximum)
1 PCI Express lane
Bus speed
500 MB/s (bi-directional)
PCI Express x16
Connectors
one
Connector size
164-pin
Connector data width (maximum)
16 PCI Express lanes
Bus speed 16 GB/s (bi-directional)

 

[lloydloo]

Get a hd 7850. It is much better than a hd 7770 and it will probably fit in your case bu thats just an assumption considering the fact that you didn't state your case's width. For the PSU I would suggest this: http://www.newegg.com/Product/Product.aspx?Item=N82E16817139027.