i recently installed 68oo gt 512 and i get error code 12 not enough free resouces that it can use if you want to use this device you will need to disable another device conflicting device ? have p4 2.8 ga8inxp mother 3 gigs memory was running 5900 ultra tought it was power supply just installed new 600 watt any help would be great cant afford new bulpild right now trying to pinch best out of older sys