Probably haven't worded the title very well, but got a strange issue where new MOBO is not recognizing GPU at POST stage but it is working fine once windows loads.
e.g. I could never get into BIOS to change anything unless I connect to inbuilt DVI connector but it will not see it via the PCI x16 GPU.
A quick google see's it is not uncommon but doesn't seem to have a solution.
Not a biggy as the PC does all work just thought it odd and I do fiddle about in BIOS from time to time.