I have disabled the floppy drove, FDC controller, I have disabled sound, I have not disabled USB as the mouse and keyboard are in fact USB, I have switched video from onboard to PCIE, still the same result. While I trouble shoot is there a possibility that a board just is not able to accept 2 cards with a riser, or that is not really an option ?
try to Set your PCIe in your Bios to lower such as Gen1
in any case if still cant detect it, you may consider buying a newer boads
there are a lot of decent second hand boards out there for less than 50bucks