Now that the old trusty STK600 device support page has been wiped from the web, I went on a search for a PDF of what socket/routing card combo I needed for a micro I have here as I could not remember - old age.
I found the user manual on the Mchip website and in the document, where in the past was the complete part number that you would find on the board silkscreen, instead you have the following:
Now the routing card does indeed have the numbers at the end of the part number, but the socket cards(at least the ones I have) have NONE of the markings listed in the tables in the 'New and Improved' manual. You must click on the link to go to the Mchip website to find what you are looking for.
This seems to be rather wasteful that the user needs to wade through the website to find what they are looking for when the user manual could(used to) have this information in one step. I guess it is worth it to Mchip to pay someone to wipe any traces of AVR/Atmel away, rather than simply leave the information intact and just put the Corporate Logo on the document and change the revision letters. Instead they put generic codes with an embedded link that can take several clicks to find the information. Brilliant way to force up the hit counts to the Mchip site to make the investors happy.