GPU Upgrade & problem
Hello, i have upgraded from my old Geforce 8400gs 512mb to GTX 550 Ti 1Gb graphic card.
When i installed the 550, everything went ok, i installed the drivers from nvidia website but when i restarted my computer, the "windows aero" theme was not working for me and the start menu task bar thing was grey and not transparent.
I went on start > run > dxdiag and all the DirectX features were Disabled and my monitor was non-PnP.
I think i know what the problem is, its because my PSU has a maximum output of 250 watts, but im not sure. Is 250 enough for gtx 550 and AMD athlon 64 x2 dual core 4000+ 2.1GHz? If yes, then what is the problem?