Ok this is what happend.. I brought a 4850, and risked trying it with a 380w psu, and i dont think it worked, So i put the old card back in) 8600GT and it kept bsod'ing just after the windows boot up, so any way, i brought a new 600w OCZ xstream psu, tried it with the 4850HD, it boots, but the windows bar now takes a gd minute plus sometimes failing to boot, but when i get into windows, simple tasks are instant, like clicking start for instance, but loading a game will take 3 minutes on a loading screen (dirt for example) but when the race starts fps is actually very good (so i dont think theres a GFX card problem). the loading screen would normally have taken 5-10 seconds. Whats going on??? 
