I can't even extract BIOS to start.
Using any of these -writehdrfile -writehexfile -writeromfile results in crash popup in windows 7 sp1 x64. I also tried it on the optiplex itself and same issue.

BIOS download:
https://www.dell.com/support/home/tt/en/...?driverId=DF2RM

The motherboard was taken out of its original case and I am attempting to use it in a normal atx case/psu. But on boot it has many error messages because it can't detect various things (due to proprietary connectors in original case). So I have to manually press to continue each boot. My hope is that I can somehow disable checks in bios. If that fails then I will have to try to rig up some fake connectors.

Any assistance is appreciated.