I need help. My goal is to have amd 7970m or 8970m outputting analog video through DVI-i out into a sync combiner extron 160xi then 4BNC RGBs to a sony BVM CRT 4BNC. My p570wm came with a 770m nvidia gpu. I uninstalled nvidia drivers, made a hardware change to an amd 7970m (came out of an alienware) in master slot, rebooted, got lots of beeps during boot that leads to system shutdown. I booted to bios next time, it shows the amd 7970m, beeps, system shutdown. I moved the 7970m into slave, put nvidia 770m in master, booted, posted, got into windows 10, installed amd drivers, device manager showing both cards - great. When i run CRTemudriver (modded amd drivers that let you send analog signal into sony bvm) its defaulting the nvidia 770m as the card that outputs dvi-i out. I tried adjusting in the application for the amd card to output through dvi-i without success. Is there a windows registry edit or command i can run to bandaid this? I briefly communicated with the seller of the laptop who said id prob have to flash a different vbios onto it. I ordered a usb device with a clamp to flash vbios-waiting on that. After my system had both gpus in and were recognized, i tried soloing the 7970m back into master, and i was welcomed back to beep city and system shutdown. My master gpu slot, when vacant, has a blackfilm with thermal pads for the underside of the nvidia gpu. The amd gpu doesnt have those additional black squares on its underside-like the nvidia 770m does. Do i need to remove it? Is that a physical issue for the amd gpu? I am new to this, bare with me, yall seem really smart. Ill try my luck. Thank you.
