Hi everyone \0/
I have same problem with upgrade my GT70 (880M stock). I buy 970M from MSI vendor, sawed the heatsink for this card, also I have last version of BIOS and Firmware, but when I try flash vbios nvflash shows ERROR: No NVIDIA display adapters found. I tried to write nvflash --protectoff, reinstall BIOS and Firmware, disconnected the battery BIOS, but nothing! And i see some interesting fact, in BIOS my laptop is signed as GT70-2OC, but if i have 880M it signed as GT70-2PE. I don't undestand, what I need doing?