I've attached a second monitor to my Radeon HD 6950 graphics card, but only one of the two outputs works.
I'll attach more system information, but I'll cut to what seems to be the source of the problem:
in the Display Adapters section of the (Win 10) Device Manager I see only one AMD Radeon HD 6900 Series driver.
I seem to remember there should be two.
I've installed the latest driver software using AMD autodetect: 15.7.1, Win 10, 64-bit which shows in the driver properties as 15.200.1062.1004, 03 Aug 15.
In the BIOS, Graphics Configuration section, there's only one setting: Intel Multiple Monitor Feature, which is set to DUAL.
Any help would be appreciated.