Can 754 be used in the 939 board

[keithmo]

can the 754 socket be used in the 939 boards

 

[scudst0rm]

No. clearly there is a significant difference in pin count. you can also tell by looking at the two sockets:
754: http://dic.academic.ru/pictures/wiki/files/115/socket_754.jpg
939:http://mrfordsclass.com/wordpress/wp-content/uploads/2008/05/socket_939.png

939 has 4 spots with missing pins while 754 has a continuous array, so there would be no way to physically fit it in, never mind make a proper electrical and logical connection.