I agree with Cbrunnem.
I personally own the Sager Np9170 w/ 7970m.
The 7970m was defective on purchase; however, it worked fine with many of the games I played so I figured it was a driver issue. (Weird purple flashing squares and misplaced textures)
However, after an update or two, I realized that it was not a driver issue so I contacted Customer Support. (By this time, it had been about 3 months since I had bought it.) I received a response within two hours, requesting I verify my problem. I verified my problem and customer support sent me an RMA right away. They were even nice enough to delay the RMA for 2.5 weeks as I had to use this laptop to finish my semester.
You may have a lemon, or it might just be one abused laptop. However, I am sure that if you contact customer support in a professional and dignified manner, they will be happy to help.
(I am not affiliated with Sager, Clevo, or XoticPC in any way, I am just a satisfied customer.)