Hello all, registered just to give my experience on what I went through last night when flashing the BIOS(s) listed in the OP in case anyone else goes through the scenario I did.
I got my first GTX Lightning about three months ago (which was a non-LN2 based card going by the BIOS revisions here,) and have constantly had problems with driver crashes while in the middle of games yadda, yadda etc, etc. so I RMA'd the card which took about a month for it to return.
This Tuesday the card came back in, so I returned to this thread to find out that I had received a locked LN2 card this time around, EXCELLENT!
My cards original BIOS was 80.04.47.00.19, so I followed the instructions to the 'T' and got ready to flash the 80.04.09.00.F8 BIOS as that was the one referenced to use by reading the directions listed, backed up my original BIOS, flashed the 80.04.09.00.F8 and then rebooted.
My windows splash screen was riddled with artifacts all over the place (the look you would get if a capacitor had failed or was beginning to fail on a card,) windows loaded and it got worse as it began its auto install drivers since it detected a hardware change, since I was able to somewhat see by moving my mouse around to refresh the screen enough to make out icons, I performed a full clean install of drivers before I restarted do to the "re-"installation" of the video card drivers.
Upon reboot, I was met with the same artifact ridden windows splash screen, but this time was taken to a 16 color 640x480 resolution desktop that could not be changed to anything higher, and even more artifacts than before as the system settled, I managed to return to here and re-download the 80.04.09.00.F8 BIOS thinking I may have a corrupt download, flashed it again and rebooted, and the same issue occurred. I then returned to this site once more, downloaded the 80.04.28.00.3A BIOS, flashed it and rebooted, and all my problems went away miraculously and so far have not had any issues with artifacts at this time.
So if you come here and flash the 80.04.09.00.F8 BIOS and get crazy amounts of artifacts when booting, flash the 80.04.28.00.3A BIOS instead and all issues should go away, I know I defiantly had a pucked butt when that was the first thing I saw after flashing the "new" BIOS to my freshly RMA'd card.
TL;DR: Was originally running 80.04.47.00.19 BIOS, flashed 80.04.09.00.F8 BIOS card arctifacted like it was failing after first reboot, flashed the 80.04.28.00.3A BIOS and it fixed the issue.
Now its time to start tweaking my over clock settings when I get home from work this evening.