A beta driver is not a completely untried/untested, but an update to the previous drivers to add features or fix bugs and needs testing by real users before releasing a final version; no different than Adobe releasing the CS6 beta, which I used without difficulty except for the non-beta drivers released by AMD/ATI. After rolling back my graphics drivers to the 12.2 version, I used the CS6 beta without issues. Dip your toes in the beta waters, the worst that can happen is you will have to roll back your drivers.
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