I have run ROCK on a DC3217IYE from the Ivy Bridge series (2nd Gen NUCs), with a
Intel® Core™ i3-3217U Processor (3M Cache, 1.80 GHz), 8GM and 240GB SATA SSD
It ran fine (just make sure you are the latest firmware) and was only upgraded when I obtained a NUC5i3 (NUC5i3MYHE) and became my spare. It is presently on loan to a friend and working fine.