Originally Posted by Marauderrt10
Prime rib is just a saying. Rib eye and prime rib are the same thing. A Ribeye is when you cut it into steaks before cooking and prime rib is a ribeye that is sliced after cooking.
Go and age that thing! Will taste delicious after 4 weeks
Originally Posted by Vision
A prime rib is a prime grade rib roast. If it's not prime grade, it's a rib roast. If cut into steaks they're rib eyes (grade not being a factor then).
Not quite true.
Prime Rib is a specific section of the rib primal, it refers to a roast from the 6th to 12th rib bones of the rib primal. It generally includes the bones. Hence, the definition of a Ribeye Roast, where the bones are removed, along with the deckle. Or the boneless Rib Roast, where the bones are removed.
A rib chop is the rib steak cut from the Prime Rib, with the bone attached. The rib steak is a steak, same location, but, no done attached. A ribeye, is the rib steak with the deckle and tail removed.
The name Prime Rib predates the USDA grading system, and has no reference to the grading of Prime. It is a grandfathered term, and it actually the only term that is still allowed to be used with a grade mark in it. In truth, it was considered the prime cut of the rib roast. Hence Prime Rib Roast.