Couldnt get the 13.11b1 to work unfortunately, will try the new ones later
How come? Windows 8?
You can try beta 3 if you like. I'm using them now.

http://forums.guru3d.com/showthread.php?t=382660
Please remember that any mention of competitors, hinting at competitors or offering to provide details of competitors will result in an account suspension. The full rules can be found under the 'Terms and Rules' link in the bottom right corner of your screen. Just don't mention competitors in any way, shape or form and you'll be OK.