AnsweredAssumed Answered

Catalyst/AMD APP not detecting second discrete GPU.

Question asked by sayantandatta on Nov 2, 2012
Latest reply on Nov 2, 2012 by sayantandatta

Hello everyone,


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.