Zoldago

Usually you do not need a modified bios in the R4. Just disabled driver signature enforcement and a modified INF.

No it's not.

It's not the same. 880M has a GK-104 Chip (Kepler) and 980M has a GM-204 Chip (Maxwell).

No, you can't. Maybe Klem can help you.

Look here https://www.techinferno.com/index.php?/files/file/68-uefi-fast-boot-secure-boot-gpu/

Are youre temps ok? Sounds a bit like temperature Problems.

https://www.techinferno.com/index.php?/announcement/4-user-account-promotion-rules-read-before-posting/

What OS do you use?

I just tried downloading M17X R4 & M18X R2 (Windows 8.1).zip and it worked.

You'll need a 120Hz Display (that you dont have) and modded drivers. There's also some work to the chassis needed to get enough space to make the card fit.

https://www.techinferno.com/index.php?/files/category/68-alienware-m18x-r1/

Have you tried a different cable to the display? Or are you sure thats a fault on the motherboard?

Did you read this? https://www.techinferno.com/index.php?/announcement/4-user-account-promotion-rules-read-before-posting/ It needs a short time to get all what you want.

Yes it's the right one.

It's like Adraesh said, with full uefi Windows 10 Installation you can use the original A13 bios. 120Hz Display is needed for the 1060/1070 (1070 needs a lot work to the Chassis), 980M will work with 60Hz Display. Driver mod is always needed if you go higher than 680M.