![]() ![]() Locate the BIOS chip as seen in the picture. Maybe after the “-ai” to also give these to make sure: atiflash -i 0 and also with atiflash -i 1 and keep screenshots if you have to remember what cards is placed where… Forget all the guides around the net with the commands, give the above command so you’ll be sure what card YOUR COMPUTER sees in what position (number 0 or 1). NOTE: ALWAYS USE atiflash -ai BEFORE YOU FLASH! Only that way you will know what GPU you’re going to flash. The mistake I made was a number, instead of flashing the “1” card in atiflash, I flashed the “0” card. The card after the “supposedly successful BIOS flash” ended up a brick. In my case, I’ve flashed my ATI 5770 Mac Edition with the BIOS ROM of my XFX 7950 ( see the previous guide). Well this ends today (at least for the ATI 5770 users). ![]() As they upgrade their graphics cards for the upcoming Mac OS X El Capitan (to have full Metal support on AMD GPUs 7xxx family and up), sometimes – like me – they end up with a small disaster by flashing the wrong card by mistake. It seems this is a common problem in the classic Mac Pro users area. ![]() This is a simple guide to show you how to save your ATI HD 5770 Mac Edition card in case of a bad BIOS flashing. ![]()
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