i had flashed my x800gto to with overclocked clocks and 16pp unlock and it worked like a charm for about a year. since a week or so, i was getting driver unload errors and when i checked, for some reason, the overclock is not stable anymore. i needed to lower the core clock and tested for stability and found the right clocks. i modded the old BIOS file to the new stable clocks using RaBIT, and i just tried winatiflash. this is in vista x64. i know it is a bad idea, but last time i flashed usnig that tool and it worked. but that was in XP. anyway, win atiflash said it cannot erase the flashROM and i thought alright, maybe it is not compatible with vista x64. and i put 3dmark all night long to loop and it didn't give the driver unload error, and was working perfectly. but today i rebooted to flash the card using the usb boot drive i created, and using the atiflash.exe, and there was no POST. system restarted every 2 seconds or so. i plugged it in dad's PC and same result. dad's PC has a G965 mobo and i thought maybe i can recover using the usb drive i created. no luck! when i used the atiflash -i command, i get "adapter not found". do i really need a PCI card, or the onboard VGA should have done the trick? any idea what i should do? please help.