Hey man, I just wanted to say thanks for making these BIOSs and I appreciate your hard work in making them work on 480's, and I'm surprised you haven't gotten much attention here...
Unfortunately, I'm not having success with them. My card is a Sapphire Nitro+ 480 4GB with Elpida memory, and I'm using the Crimson 17.11.1 driver.
I benchmarked a few games, and saw a slight performance increase, but when I went to go browse Facebook and YouTube, my browser started glitching out, becoming unresponsive for a few seconds before either continuing to work fine, or throwing a WebGL error and refreshing the page, or a couple times it would just BSOD saying VIDEO_SCHEDULER_INTERNAL_ERROR. This was with the CustomMod BIOS. I then flashed over the StockMod to see if that would help anything but I still get the same issues.
UPDATE: After a bit more testing, I discovered those errors were related to hardware acceleration in Chrome. Once I turned that off, everything has been smooth and stable... For now.