How do you identify a 1700+b?

[Tnvolsfan]

I know, I'm a rookie to overclocking.

 

[ChampionAtTufshop]

is it in the system or sitting outside?

if in system, download wcpuid and see if it says 681 (tbred b) or 680 (tbred a)

if its sitting outside, the last 5 letter/#'s should be DUT3C
stepping should also either be JIUHB or JIUCB