A few days ago i bought revision 8A of this MB and it seems that voltage regulator for 3.3v is missing. somwhere i found info that revison 8A was made with and without voltage regulator and also version with voltage regulator had some modification on bottom side (pigtail with some signal rerouted). If I manage to gather all differences maybe it would be possible to upgrade my MB to handle CPUs with 3.3V. I also ask all of members who have revision 8A with voltage regulator (it is located above cpu socket in TO220 housing) to send photos here of top and bottom of this motherboard.