There is a newer driver. 13.15
http://www2.ati.com/drivers/beta/AMD_Catalyst_Win8.1_Release_Preview_V2-13.15.100.1.exe
Highlights of the AMD Catalyst™ OpenGL 4.3 Beta Driver:
Full support for OpenGL 4.3
This is the second release as all especialy designed for Windows 8.1 aka Windows Blue but will also work on Win7 and Win8 of course !
Resolved Issues:
Enduro Technology on AMD + AMD Ubuntu platforms - Source Engine games hang when running on the High Performance ASIC
Maya 2011-2013 – Various visual corruptions issues have been resolved
Maya 2011-2013 – Mesh/Polygons selection performance has been improved
Unigine Heaven – Intermittent Crashes have been resolved
Unigine Heaven – Performance has been improved up to 11% on single GPU configurations
Left 4 Dead 2 – Visual corruption issues have been resolved
Build Info:
DriverVer=07/16/2013, 13.150.100.1000
13.15.100.1-130716a-159704E-ATI
CCC: 2013.0716.2356.41154
D3D : 9.14.10.0984
OGL: 6.14.10.12414
OCL: 10.0.1268.1