I got the GPU working by reinstalling windows using legacy boot rather than UEFI. No idea why that was the reason but it works. Hurrah!
I want to use a Quadro P400 in my Poweredge R220 for DeepStack object detection. I ordered the pcie riser, installed it then my p400 and booted up the R220. Getting the R220 to start was a bit weird as I had to unplug the R220 then plug it back into power then it would boot up. Then I installed the quadro drivers and rebooted. Windows sees the P400 but the driver won't work, it says "This device cannot find enough free resources that it can use. (Code 12)" I checked the system BIOS and the pcie port is enabled and I don't see any other settings that could be the cause. Anyone have any ideas? OS is Windows Server 2019 Standard, CPU is an E3-1220 v3, has 8GB of 1600Mhz RAM, idrac7 enterprise and dual broadcom nics.
Quadro P400 won't work in PowerEdge R220, Code 12 error