There is clearly something wrong with the 64bit drivers, as a few days ago i tested the card under xp and vista under 32bit and the card works fine.
The only way the card works under windows 7 64bit is if i used my driver disk that came with the card witch has CCC 9.10 and drivers from 2009.
The last new drivers that i know of that did work was the 13.1 AMD Catalyst 13.1 Legacy Download
but you can't get thous anywhere.
I used DDU but nothing changed and the drivers from windows update witch are from 2011/12 also worked fine.
i would use the driver from windows update but i want to use the setting in Catalyst.
** Windows 7 and Windows 8.1 must be fully updated before attempting to install any AMD driver. All 'critical', 'recommended', and 'optional' (no language packs,etc) updates as well as any Service Packs (SP) must be installed before any attempt to install graphics drivers. If you do not get this message .... keep installing until you do: