I have a BIOSTAR NM70I-1037U motherbord that I am using to bring an old PC back to life.
Power requirements should be minimal, although I don't know how to determine what the actual requirements would be.
The existing power supply I have for the case doesn't have the right connectors for the new motherboard.
The case has approx. 55mmx85mmx900mm space for a PSU.
Since I am just refurbishing an old PC I don't want to spend too much so old models that I might be able to pick up from ebay or elsewhere can be acceptable answers.
I am quite happy to mod the case to make it fit - up to a point. e.g. cutting a hole for a cable is OK but having a giant PSU sticking out the side is probably not!
Since I have replaced the motherboard with the mini-itx one above there is huge amounts of airflow. It is just going to be sitting on my desk for playing old Sega arcade games on an emulator.