I have the following sytem configuration right now:
Motherboard: ASUS P8P67
PCIE x16(BLUE) : ASUS Radeon HD 7970
PCIE x4(BLACK) : Sapphire Radeon HD 4890
OS: Ubuntu 12.04(x64), Catalyst ver:12.4 , AMD APP 2.6
OS: Windows 7(x64) , Catalyst ver 12.10, AMD APP 2.5
Both the OS detect the second card in hardware information but catalyst/APP doesn't detect the second GPU in either OS.
In ubuntu I checked using lspci command.
In windows I checked using hardware information GUI.
When my monitor is attached to the 7970 and I get output on the screen. However when I connect the monitor to 4890 while the 7970 is still in the x16 slot I don't get any output on screen.
How do I use my 4890 for opencl only and the 7970 for both opencl and display ?
It would be greatly helpful if anyone can provide a step by step tutorial for both OSes.