Question: Mac Pro 4,1 (Early 2009) mainboards compatibility for replacement
I have a Mac Pro that actually have a faulty second logic Board that have a circuit that was pulled off by mistake, it's working but makes cpu board fans running at full speed. Now according to the original board of the Mac Pro, that came with parts number: *J595100UJBH7A* 939-0459 CHINA & *J595100KWCU7A* 631-1271 CHINA with CPU 2x 8Cores board part number *J594700SYBXZA* 939-0505 CHINA, what are the logic boards that can be purchased, without doing any CPU's fan noise and full spinning please. Also, are this one: *C07017702XADCVKA0* 631-1474 &. *C070177034VDD4GA2* 939-1062 compatible.