The first Bulldozer supported AM3+ mobo from MSI (Big Bang Theory...I mean Conqueror)

[haylui]

can't figure out socket am3+ has 942 pins which is only 1 pin more than am3; could it be, when you insert AM3 processor, without the pin detected, it will run at different I/O?

[jeremyshaw]

can't figure out socket am3+ has 942 pins which is only 1 pin more than am3; could it be, when you insert AM3 processor, without the pin detected, it will run at different I/O?

Likely, similar to how Socket AM3 only has 938 vs 939 for AM2/AM2+ (or something like that). AM2 is only HT1, and AM2+ has split power planes or something like that. AM3 has DDR3 and HT3 (though I think AM2+ has HT3?).

[Spreader]

can't figure out socket am3+ has 942 pins which is only 1 pin more than am3; could it be, when you insert AM3 processor, without the pin detected, it will run at different I/O?

no, am3+ cpu-s will have more pins than am3 cpu`s(+1,2 pins); and that`s because will have to fit only in his socket am3+;
am3 cpus can enter in am3, am2, and am3+ because of lack of key/pins;