Most new power supplies are ATX 2.03 compliant so that is not a problem, Mark. I did want to get a 300W anyway. Could you give some sites or more information about the holes in the motherboard tray for the heatsink/fan? I was going to put together a clear case from DesignComp.com, and then install the guts when it was finished. The reason I wanted to know is it would take about a month after ordering to get my case, since it will be custom. Then I could get the case tweaked and buy the new board and CPU in Dec./Jan.! Thanks for reading through this rant.