So I recently bought the EVGA GeForce GTX 1070 FTW GAMING ACX 3.0, the one that has temperature problems. They recently released a a new BIOS update and now I dont know how to do it. I followed the steps in their guide but once I press "y" to update the screen just goes black for like 5 seconds and then it goes back to normal and nothing happens. I dont know how to update the bios and need help please.

Mine is the 08G-P4-6276-KR - EVGA GeForce GTX 1070 FTW ACX 3.0 (the one in the bottom) and the info regarding the bios update is here http://www.evga.com/thermalmod/default.asp#status.

It also says "For Dual BIOS cards, card must be set to BIOS that is being flashed", how do I know if my card is a dual BIOS card and how do I flash it (never done it before nor do I know what it means).

TIA!