Do I need to flash or upgrade BIOS? I am just asking out of curiosity, because I read that some motherboards will not support a graphics card if there is no BIOS flash/update. I never done it before, so I will try to stay out of touching BIOS as I know that it is risky to play around in it. My motherboard is DG33M06, and the card that I have now is ATI/AMD/Dell Radeon HD3450 64-bit, and I will be putting in a Sapphire Radeon R7 250 1GB GDDR5 128-bit. By the way, I can replace a 64-bit graphics card with a 128bit one?