Hi, I have tried to flash my card video but I got a big problem! Model of card video: Diamond HD 3870 x2 1GB used by 1 one year without problems; Motherboard: ASUS P5Q3 wi-fi deluxe; Memory: Patriot 1333Mhz 2GB PSU: 800 W (I forget the brand, but it is very expensive ) OS: Windows 7 business Situation: - The card video worked perfectly during one year, but two days ago didn't work anymore. No overclock procedure was realized in this card video, no update of ATI drivers. - During BIOS POST, I hear one long beep and after 3 short beep, that is: VGA NOT DETECTED. - I have replaced the HD 3870 x2 by a nvidia card video and worked perfectly. - I think that the bios was corrupted, could it be possible? So, I have tried to flash the bios card. I have used the bios files from this Thread “http://forums.techpowerup.com/showthread.php?t=57907”. It is R680A.bin and R680B.bin. Flash procedure: 1) I put a nvidia card video in the first PCIe slot an then I put the HD 3870 x2 in the second PCIe slot. 2) I started the computer and boot from a USB drive with DOS files , atiflash and bios file. 3) In the command line I typed these commands: atflash.exe –p –f 0 R680A.bin ( for fisrt core) – The update is completed and then I typed the command flash for the second core: atiflash.exe –p –f 1 R680B.bin – However, nothing happens during a long time (I have waited for 30 minutes). I have tried other bios files and I got the same troubles. In addition, I tried the command “atiflash.exe –I” to get the information, and nothing happens. Question: Is that bios files compatible with my video card? Is there other way to flash the bios? Is The second bios core damaged? Thank you in advance for your help!!