Hello, I encountered strange issue with HP 6465b and video drivers. The last one to be working for me is 8982108121003A1147882C (22 X 2012) aka sp59440.exe, which is recommended for Windows 8 64bit. However, any newer version, starting with offical AMD/ATI Catalysts 13.4, literally kills 3D acceleration of integrated GPU in APU (Radeon 6520g): After about 5 minutes since login, it seems that 3D acceleration just stops working. Not just in games, that run super slow, but even windows and menus rendering in Windows is slow and choppy. Interestingly, I found out that this behaviour happens only when wifi/ethernet adapters are enabled. When I disable them, everything just works fine.
I would stick with mentioned driver version, however I have updated my Windows 8 to Windows 8.1 and these drivers are pre-8.1, so I am currently experiencing issues with Flash that seems to be GPU driver related.
So far I have tried to reinstall/update wifi and ethernet drivers and tried different Catalyst versions; it seems this issue starts with Catalysts 13.4 and continues with 13.8 (integrated catalyst version in Win 8.1), official HP AMD video driver for Windows 8.1 64bit (13.152-130830A-162083C (18 X 2013) aka sp63570.exe) and even newest 13.12. Also, I confirmed it happens both in Windows 8 and 8.1 (I could try it on Windows 7).
Any feedback is welcomed. I was also wondering if this could be hardware related, but since I have never experienced any 3D GPU issues with older Catalyst verions, it seems strange.
HP 6465b, Windows 8.1, BIOS version F.41.