Alienware M18XR2 980 4gb Problem

Hi, I have a problem on my AW 18 R2, I tried to mount a gtx 980 4 gb but the screen remains black and I have 8 beeps, if I remove the button battery and then I plug it in again I have 5 beeps, I turn off and 8 beeps come back, I have tried many times my bios and A12, what can I do? maybe and the 980 not compatible? it was mounted first on a msi
Thank you

 

Are you referring to the 980M? Not 980 (desktop) card?

You want to first make sure you have on this BIOS:

http://forum.notebookreview.com/threads/release-improved-m18x-r2-maxwell-legacy-bios.800447/

 

Yes 980m
I’m A12 Bios

 

what should I do? I have to go back to the Bios A11, with A12 it doesn't work, maybe I have to unlock it?

 

Most likely incompatible card/VBIOS. I’ve never seen a 4GB 980M mxm variant

 

if I buy a 980m 8gb with the stock bios A12 does it work or do I have to do something in particular?

 

it's a MSI GTX 980M 4GB

 

I’ve never seen/handled one

 

Is it a G-Sync card? Mentioning that as I don't think G-Sync cards are compatible?

 

Go into BIOS while on A11 unlocked BIOS look for the video mode and change from PEG to SG.

Then install into laptop and try.