Hello. My problem: A few days ago i discovered wierd system crashes through display artifacts or black screens. It all stopped after I replaced my MSI 270x with my old 4850. Guys on a different forum suggested me to flash a new bios into my card and I did it because of my hesitation. However I want to send the card on a warranty, but did I void it so far by using atiwinflash? I don't know that myself, so I tried to flash my old backed up bios with this program, but it freezed the system, so I had to reset during the process and now I can't even load my desktop, cause of blackscreen and strange speed up from the gpu cooler. Help please!