Asus G46VW Not Recognizing Graphics Card

I just purchased an Asus G64. It comes with an NVIDIA GeForce GTX 660M 2GB graphics card. However, when I run dxdiag, it shows my graphics card as an integrated chip (the HP HD 4000.) I tried downloading a driver and still no dice. Any tips are appreciated. Thanks!
Tech Support Guy System Info Utility version 1.0.0.2
OS Version: Microsoft Windows 8, 64 bit
Processor: Intel(R) Core(TM) i5-3210M CPU @ 2.50GHz, Intel64 Family 6 Model 58 Stepping 9
Processor Count: 4
RAM: 8077 Mb
Graphics Card: NVIDIA GeForce GTX 660M, -2048 Mb
Hard Drives: C: Total - 693884 MB, Free - 616627 MB;
Motherboard: ASUSTeK COMPUTER INC., G46VW
Antivirus: Windows Defender, Disabled