torbed

You can update your OSD Drive , you can also check for a lose cable

On Tuesday, January 19, 2016 at 2:32 PM, huangsj said:

I installed a 980M in my Alienware M18x R2.

 

However, I found that it constantly reboots when the laptop is not plugged in.

 

Is anyone able to help?

You can check your bios if it has the latest update

Also you can borrow another battery and give it a try , to rule out any battery problems

A Friend of mine is using  AMD Radeon HD 7970M and it's working just fine , you can also take a look at the AMD Radeon HD 8970M

You can try to power it up without battery just the AC only , also you must check that you didn't break lose any drive or card inside

SVL7 nice job