hi, i am quite new to overclocking and found this forum very informative and helpful, however, whenever i have tried to flash my bios, i have always had a bad flash (totally blank screen) and have had to flash back. the vid card i have is a PowerColor Radeon 9550 256MB. i have read that i am to look at some the numbers on the card and i saw "Samsung K4D551638F_TC50". so i tried to flash to the Samsung PowerColor Radeon 9600Pro 256MB dated Apr 25th 2004 6:06 AM. i have also tried others which i thought would have matched, but to no avail ...so is it possible that some cards just cannot be flashed?...btw, i have also used ATItool to OC it a bit, but i was just wondering if i could flash the bios. Thanks in advance.