ATI's Catalyst 12.8 has some installer problems where it doesn't completely supersede the previous driver you had installed.  You may have run into them.

This was the information ATI returned to me when I reported the problem to them (I'm not a fan of automatic cleaners, but this is verbatim from them): 

1. Uninstall all ATI drivers and any other video card software from the Add or Remove Programs and Features in the Windows Control Panel. Click on AMD Catalyst install manager, click change and then choose the option to express remove all AMD software.
   
   
2. Try using a driver cleaner program to make sure the drivers are removed: Please keep in mind that the (Driver Cleaner / Driver Sweeper are 3^rd party software and not supported by AMD) please refer to their websites for instruction and guidance.
   
   Driver Cleaner Professional
   http://www.afterdawn.com/software/desktop_software/other_tools/driver_ cleaner_pro.cfm
   
   
3. Disable any running background software such as firewalls and antivirus.
   
   
4. Make sure your operating System has the latest Service Packs and patches / updates.
   
   
5. Make sure your motherboard has the latest BIOS and CHIPSET software (you can get these updates directly from the manufacturer of the motherboard or Computer).
   
   
6. Make sure your power supply has adequate wattage.
   
   
7. Since you have a desktop Radeon HD graphics card in windows then install this driver: http://sites.amd.com/us/game/downloads/Pages/radeon_win7-64.aspx
   
   
8. If the problem still exists please try installing your video card in another PC or try installing another video card in your PC if possible, this will tell us if the issue follows the graphics card or the PC.
   
   
9. Or test your other hardware like RAM, CPU , USB devices…etc to make sure they do not create the problem.
   
   
10. If the problem still exists please download the Belarc Advisor - a free system diagnostics, system information and benchmarking to create a problem report as described: In HTML format and attach file to e-mail.
    
    http://www.belarc.com/free_download.html
    
    Download the ‘Belarc Advisor’ from the ‘Products’ tab at the top of the page.
    
    
11. If you are looking for a specific driver, a list of previous drivers can be found here:
    
    

64-Bit: http://support.amd.com/us/gpudownload/windows/previous/Pages/radeonaiw _vista64.aspx

32-Bit: http://support.amd.com/us/gpudownload/windows/previous/Pages/radeonaiw _vista32.aspx

See also this thread where I had a similar problem as you, then solved it:

http://forums.adobe.com/message/4638840

-Noel

Money back for what?  Your video card?

I don't have your same video card (mine's a 5670), but I don't see crashes when doing 3D.  I did briefly when I had a driver installation problem, but reinstalling fixed it.

Entirely up to you whether you request a refund.  Did you not test Photoshop for the 30 day free trial before buying?

-Noel

One other thing to try...  Catalyst 12.4 seemed to be a particularly good version for use with Photoshop CS6.  I did a lot of 3D work with 12.4 successfully.

-Noel