ATI Catalyst Drivers 10.5 are here. Don't forget to grab the Avivo update, too.
http://support.amd.com/us/gpudownload/Pages/index.aspx?src=CCC-CheckForDriverUpdates Win8 64-bit Pro Retail
Intel i7-4770
16GB DDR3 1600 8-8-8-24
MSI Z87-G45 Motherboard
ASUS GTX 660 Direct CU II OC 2GB GPU
1 TB RAID 1 (mirrored) Drive Array
Several scratch drives for video, TMP, pagefile.