I have installed Ubuntu 12.04 on my PC, but without 2 AMD graphics card on PCIe. So I am using PC with Intel graphics card which is on board so far.
But I bought 2 AMD graphics card HD7970. But for computing purpose not for connecting and expanding monitors but really only for parallel computing. So it means that I want to stay on Intel gr, was that there is some xorg.conf and needs to be edited. But I think in my case it hasn't. Because I have no monitors to connect to this 2 AMD graphics card. Am I right? If there is answer to this question please direct me. If not I will be very gratefull for answer. And sorry for my english I am not the native speaker. Thank you in advance for any answer.