help needed to identiy Duron

[darktorch]

There are two Duron 750, one is D750AUT1B-N , the other is D750AUT1B . what does this code mean? What is the difference between these two chips?
Thanks

 

[AndyHui]

No difference really. As far as the codes are concerned on the first line of the markings of the CPU, there is no material difference to you.