Article: Native Support for NVIDIA GTX 650 Ti and GTX 660 Graphics Cards in 10.8.3
No problem with the 2gb 650ti. Just make sure to disable onboard graphics in bios.
I had the same problem when I created the installer in an USB 2.0 drive and connected to a USB 3.0 port. Connect your USB drive to a USB 2.0 port and try again.
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