Black screen after installing new GPU

So I got an AMD RX580 to replace my GTX 760 in my cMP 5,1. Booted to open core boot picker and the apple logo appears and the progress bar gets about a third in and then black screen. I booted to my other ssd that has Mojave and it works perfectly. So after trying a few things and making it worse. I decided to re install Monterey with OCLP. I created a new USB and installed it. First time it got stuck in a boot loop. I realised I hadn’t cleared the efi partition that has opencore so I wiped the whole drive and tried again. This time it worked! I got in applied the root patch and installed opencore to the disk. Happy days restarted it works wifi works and Bluetooth, although my mouse didn’t work at all during the setup part even plugged in via a usb hub, a lot of tabbing got me through.

So I wake up this morning and put my HDD AND SSD (with the Mojave partition) back in bays 1 and 2 hoping I can grab the installers for logic and all of my audio plugins. And now back to square 1 about a third way through the progress bar it just goes blank and my monitor says there is no signal. I tried booting into recovery and I get the error in the pic. I have tried removing the HDD and SSD and resetting the NVRAM using the executable in the boot picker and nothing has worked. The system stays on but displays nothing and eventually goes to sleep. Any help would be appreciated.

I’m using OCLP version 1.30 and I am running Monterey. Mac Pro 5,1 single CPU with 32GB of ram, boot drive is an nvme drive on a PCIe adapter. Saffire RX 580.