Where can I find ALL of the memory specs for the Mac Pro?
Aha! A quick google search with the alpha-numeric code on the sticker of my RAM led me to the manufacturer's (SK hynix) website, where they have complete details on this particular make of RAM. 

https://www.skhynix.com/products/computing/view.jsp?info.ramKind=20&amp;info.serialNo=HMT325U7CFR8C

However, I still wonder if there is software that could have told me all this information.