Hi, chimera users

I am starting to use ucsf chimera to analysis protein structure recently. It is an excellent software, and I have no problem using it at school. But when I try to use it on my other pc at home. It doesn't work properly. The ribbon looks flat and dull, not a 3D looking anymore, like the situation showed in pic1 and pic2. 
My hardwares:
School PC: win7 64 bit,cpu E5-1606, Nvidia Quadro 5000, 4G
Home PC: win7 64 bit, cpu i5-2500k, AMD Radeon HD6700, 8G
I know the video card of school's pc is much better, but I checked the hardware list. HD6700 is also compatible. 
Can anyone tell me what is wrong? I really appreciate it.
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                                                                                                                                                                                                             Jack Wang